[ARM] 5435/1: fix compile warning in sanity_check_meminfo()

Compiling recent 2.6.29-rc kernels for ARM gives me the following warning:

arch/arm/mm/mmu.c: In function 'sanity_check_meminfo':
arch/arm/mm/mmu.c:697: warning: comparison between pointer and integer

This is because commit 3fd9825c
"[ARM] 5402/1: fix a case of wrap-around in sanity_check_meminfo()"
in 2.6.29-rc5-git4 added a comparison of a pointer with PAGE_OFFSET,
which is an integer.

Fixed by casting PAGE_OFFSET to void *.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/mmu.c

@@ -694,7 +694,7 @@ static void __init sanity_check_meminfo(void)
 		 * the vmalloc area.
 		 */
 		if (__va(bank->start) >= VMALLOC_MIN ||
-		    __va(bank->start) < PAGE_OFFSET) {
+		    __va(bank->start) < (void *)PAGE_OFFSET) {
 			printk(KERN_NOTICE "Ignoring RAM at %.8lx-%.8lx "
 			       "(vmalloc region overlap).\n",
 			       bank->start, bank->start + bank->size - 1);