mark <zlib.h> with for-crc32 in a consistent manner

in many cases, <zlib.h> is only included for crc32 function,
and in some of them, there's a comment saying that, but in
a different way.  In one place (hw/net/rtl8139.c), there was
another #include added between the comment and <zlib.h> include.

Make all such comments to be on the same line as #include, make
it consistent, and also add a few missing comments, including
hw/nvram/mac_nvram.c which uses adler32 instead.

There's no code changes.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/net/cadence_gem.c

@@ -23,7 +23,7 @@
  */
 
 #include "qemu/osdep.h"
-#include <zlib.h> /* For crc32 */
+#include <zlib.h> /* for crc32 */
 
 #include "hw/irq.h"
 #include "hw/net/cadence_gem.h"

hw/net/dp8393x.c

@@ -27,7 +27,7 @@
 #include "qapi/error.h"
 #include "qemu/module.h"
 #include "qemu/timer.h"
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 #include "qom/object.h"
 #include "trace.h"
 

hw/net/ftgmac100.c

@@ -24,8 +24,7 @@
 #include "hw/qdev-properties.h"
 #include "migration/vmstate.h"
 
-/* For crc32 */
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 
 /*
  * FTGMAC100 registers

hw/net/i82596.c

@@ -19,7 +19,7 @@
 #include "qemu/module.h"
 #include "trace.h"
 #include "i82596.h"
-#include <zlib.h>       /* For crc32 */
+#include <zlib.h> /* for crc32 */
 
 #if defined(ENABLE_DEBUG)
 #define DBG(x)          x

hw/net/imx_fec.c

@@ -33,8 +33,7 @@
 #include "net/eth.h"
 #include "trace.h"
 
-/* For crc32 */
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 
 #define IMX_MAX_DESC    1024
 

hw/net/lan9118.c

@@ -22,8 +22,7 @@
 #include "qapi/error.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
-/* For crc32 */
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 #include "qom/object.h"
 
 //#define DEBUG_LAN9118

hw/net/mcf_fec.c

@@ -16,8 +16,7 @@
 #include "hw/net/mii.h"
 #include "hw/qdev-properties.h"
 #include "hw/sysbus.h"
-/* For crc32 */
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 
 //#define DEBUG_FEC 1
 

hw/net/npcm7xx_emc.c

@@ -29,8 +29,7 @@
 
 #include "qemu/osdep.h"
 
-/* For crc32 */
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 
 #include "hw/irq.h"
 #include "hw/qdev-clock.h"

hw/net/rtl8139.c

@@ -48,10 +48,8 @@
  *  2011-Mar-22  Benjamin Poirier:  Implemented VLAN offloading
  */
 
-/* For crc32 */
-
 #include "qemu/osdep.h"
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 
 #include "hw/pci/pci_device.h"
 #include "hw/qdev-properties.h"

hw/net/smc91c111.c

@@ -17,8 +17,7 @@
 #include "qapi/error.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
-/* For crc32 */
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 #include "qom/object.h"
 
 /* Number of 2k memory pages available.  */

hw/net/stellaris_enet.c

@@ -15,7 +15,7 @@
 #include "net/net.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 #include "qom/object.h"
 
 //#define DEBUG_STELLARIS_ENET 1

hw/nvram/mac_nvram.c

@@ -35,7 +35,7 @@
 #include "qemu/module.h"
 #include "qemu/error-report.h"
 #include "trace.h"
-#include <zlib.h>
+#include <zlib.h> /* for adler32 */
 
 #define DEF_SYSTEM_SIZE 0xc10
 

target/arm/helper.c

@@ -19,7 +19,7 @@
 #include "qemu/crc32c.h"
 #include "qemu/qemu-print.h"
 #include "exec/exec-all.h"
-#include <zlib.h> /* For crc32 */
+#include <zlib.h> /* for crc32 */
 #include "hw/irq.h"
 #include "sysemu/cpu-timers.h"
 #include "sysemu/kvm.h"

target/arm/tcg/helper-a64.c

@@ -33,7 +33,7 @@
 #include "qemu/int128.h"
 #include "qemu/atomic128.h"
 #include "fpu/softfloat.h"
-#include <zlib.h> /* For crc32 */
+#include <zlib.h> /* for crc32 */
 
 /* C2.4.7 Multiply and divide */
 /* special cases for 0 and LLONG_MIN are mandated by the standard */

target/loongarch/tcg/op_helper.c

@@ -14,7 +14,7 @@
 #include "exec/cpu_ldst.h"
 #include "internals.h"
 #include "qemu/crc32c.h"
-#include <zlib.h>
+#include <zlib.h> /* for crc32 */
 #include "cpu-csr.h"
 
 /* Exceptions helpers */