[ARM] Ensure linux/hardirqs.h is included where required

... for the removal of it from asm-generic/local.h

Signed-off-by: Russell King <[e-mail]>

arch/arm/kernel/traps.c

···
 #include <linux/personality.h>
 #include <linux/kallsyms.h>
 #include <linux/delay.h>
+#include <linux/hardirq.h>
 #include <linux/init.h>
 #include <linux/uaccess.h>
 

arch/arm/mm/fault.c

···
 #include <linux/module.h>
 #include <linux/signal.h>
 #include <linux/mm.h>
+#include <linux/hardirq.h>
 #include <linux/init.h>
 #include <linux/kprobes.h>
 #include <linux/uaccess.h>