ARM: add missing HYP mode constant

In order to be able to use the various mode constants (far more
readable than random hex values), add the missing HYP and A
values.

Also update arm/lib/interrupts.c to display HYP instead of an
unknown value.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/lib/interrupts.c b/arch/arm/lib/interrupts.c
index 758b013..f6b7c03 100644
--- a/arch/arm/lib/interrupts.c
+++ b/arch/arm/lib/interrupts.c
@@ -103,7 +103,7 @@
 	"UK12_26",	"UK13_26",	"UK14_26",	"UK15_26",
 	"USER_32",	"FIQ_32",	"IRQ_32",	"SVC_32",
 	"UK4_32",	"UK5_32",	"UK6_32",	"ABT_32",
-	"UK8_32",	"UK9_32",	"UK10_32",	"UND_32",
+	"UK8_32",	"UK9_32",	"HYP_32",	"UND_32",
 	"UK12_32",	"UK13_32",	"UK14_32",	"SYS_32",
 	};