linux-user: Remove REAL_HOST_PAGE_ALIGN from mmap.c

We already have qemu_real_host_page_size() in a local variable.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-10-richard.henderson@linaro.org>

linux-user/mmap.c

@@ -585,7 +585,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int target_prot,
              * the hosts real pagesize. Additional anonymous maps
              * will be created beyond EOF.
              */
-            len = REAL_HOST_PAGE_ALIGN(sb.st_size - offset);
+            len = ROUND_UP(sb.st_size - offset, host_page_size);
         }
     }