ARMv8: Enable all asynchronous abort exceptions taken to EL3

Allow EL3 to handle all the External Abort and SError interrupt
exception occur in all exception levels.
Signed-off-by: NChee Hong Ang <chee.hong.ang@intel.com>

arch/arm/include/asm/macro.h

@@ -193,6 +193,10 @@ lr	.req	x30
 			SCR_EL3_SMD_DIS | SCR_EL3_RES1 |\
 			SCR_EL3_NS_EN)
 #endif
+
+#ifdef CONFIG_ARMV8_EA_EL3_FIRST
+	orr	\tmp, \tmp, #SCR_EL3_EA_EN
+#endif
 	msr	scr_el3, \tmp
 
 	/* Return to the EL2_SP2 mode from EL3 */

arch/arm/include/asm/system.h

@@ -29,6 +29,7 @@
 #define SCR_EL3_HCE_EN		(1 << 8)  /* Hypervisor Call enable          */
 #define SCR_EL3_SMD_DIS		(1 << 7)  /* Secure Monitor Call disable     */
 #define SCR_EL3_RES1		(3 << 4)  /* Reserved, RES1                  */
+#define SCR_EL3_EA_EN		(1 << 3)  /* External aborts taken to EL3    */
 #define SCR_EL3_NS_EN		(1 << 0)  /* EL0 and EL1 in Non-scure state  */
 
 /*