Remove unused KUSER_AREA, SYSPTSIZE, USRPTSIZE.

Bump MAXTSIZ and MAXDSIZ to the same values atari is using.
This makes gcc 4.8 (/usr/libexec/cc1) load and execute.

sys/arch/amiga/include/vmparam.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: vmparam.h,v 1.42 2011/02/08 20:20:08 rmind Exp $	*/
+/*	$NetBSD: vmparam.h,v 1.43 2015/06/01 17:16:56 phx Exp $	*/
 
 /*
  * Copyright (c) 1988 University of Utah.
@@ -64,19 +64,19 @@
 #ifndef USRSTACK
 #define	USRSTACK	0x1E000000
 #endif
-#define KUSER_AREA	(-UPAGES*PAGE_SIZE)
+
 /*
  * Virtual memory related constants, all in bytes
  */
 
 #ifndef MAXTSIZ
-#define	MAXTSIZ		(6*1024*1024)		/* max text size */
+#define	MAXTSIZ		(16*1024*1024)		/* max text size */
 #endif
 #ifndef DFLDSIZ
 #define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
 #endif
 #ifndef MAXDSIZ
-#define	MAXDSIZ		(128*1024*1024)		/* max data size */
+#define	MAXDSIZ		(256*1024*1024)		/* max data size */
 #endif
 #ifndef	DFLSSIZ
 #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
@@ -85,13 +85,6 @@
 #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
 #endif
 
-/*
- * Sizes of the system and user portions of the system page table.
- */
-/* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
-#define	SYSPTSIZE	(2 * NPTEPG)	/* 16mb */
-#define	USRPTSIZE 	(1 * NPTEPG)	/* 16mb */
-
 /*
  * PTEs for mapping user space into the kernel for phyio operations.
  * One page is enough to handle 16Mb of simultaneous raw IO operations.