ARM: mach-shmobile: fix compile warning in mm/init.c

Turn down the warning noise from the compiler,
basically a SH-Mobile specific version of the
patch located in the RMK patch tracker:

6484/1: "fix compile warning in mm/init.c",

Without this patch the following warning triggers:

 CC      arch/arm/kernel/sys_arm.o
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'
  CC      arch/arm/kernel/traps.o
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

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

@@ -2,6 +2,6 @@
 #define __ASM_MACH_VMALLOC_H
 
 /* Vmalloc at ... - 0xe5ffffff */
-#define VMALLOC_END 0xe6000000
+#define VMALLOC_END 0xe6000000UL
 
 #endif /* __ASM_MACH_VMALLOC_H */