msm: make constant unsigned long to correct format warning

Define VMALLOC_END as an unsigned long to match expected type.
Eliminates a warning:

arch/arm/mm/init.c: In function 'mem_init':
arch/arm/mm/init.c:606: warning: format '%08lx' expects type
   'long unsigned int', but argument 12 has type 'unsigned int'
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
Signed-off-by: NDaniel Walker <dwalker@codeaurora.org>

arch/arm/mach-msm/include/mach/vmalloc.h

@@ -16,7 +16,7 @@
 #ifndef __ASM_ARCH_MSM_VMALLOC_H
 #define __ASM_ARCH_MSM_VMALLOC_H
 
-#define VMALLOC_END	  0xd0000000
+#define VMALLOC_END	  0xd0000000UL
 
 #endif