ARM: fix /proc/interrupts formatting

As per x86, align the initial column according to how many IRQs we
have.  Also, provide an english explaination for the 'LOC:' and
'IPI:' lines.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c
index 6ff7919..47837b8 100644
--- a/arch/arm/kernel/fiq.c
+++ b/arch/arm/kernel/fiq.c
@@ -67,10 +67,11 @@
 
 static struct fiq_handler *current_fiq = &default_owner;
 
-int show_fiq_list(struct seq_file *p, void *v)
+int show_fiq_list(struct seq_file *p, int prec)
 {
 	if (current_fiq != &default_owner)
-		seq_printf(p, "FIQ:              %s\n", current_fiq->name);
+		seq_printf(p, "%*s:              %s\n", prec, "FIQ",
+			current_fiq->name);
 
 	return 0;
 }