feat(gic600ae_fmu): enable all GICD, PPI, ITS SMs

The following SMIDs are disabled by default.

* GICD: MBIST REQ error and GICD FMU ClkGate override
* PPI: MBIST REQ error and PPI FMU ClkGate override
* ITS: MBIST REQ error and ITS FMU ClkGate override

This patch explicitly enables them during the FMU init sequence.

Change-Id: I573e64786e3318d4cbcd07d0a1caf25f8e6e9200
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/include/drivers/arm/gic600ae_fmu.h b/include/drivers/arm/gic600ae_fmu.h
index 904a5f9..88b87b9 100644
--- a/include/drivers/arm/gic600ae_fmu.h
+++ b/include/drivers/arm/gic600ae_fmu.h
@@ -37,6 +37,7 @@
 /* SMEN constants */
 #define FMU_SMEN_BLK_SHIFT	U(8)
 #define FMU_SMEN_SMID_SHIFT	U(24)
+#define FMU_SMEN_EN_BIT		BIT(0)
 
 /* Error record IDs */
 #define FMU_BLK_GICD		U(0)