refactor(nxp): use DPG0 mask from Arm GICv3 header

Removed GICR_CTLR_DPG0_MASK definition from platform GIC header file
as Arm GICv3 header file added its definition.

Change-Id: Ieec43aeef96b9b6c8a7f955a8d145be6e4b183c5
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/include/drivers/nxp/gic/gicv3/plat_gic.h b/include/drivers/nxp/gic/gicv3/plat_gic.h
index 0c0d0fc..794b06b 100644
--- a/include/drivers/nxp/gic/gicv3/plat_gic.h
+++ b/include/drivers/nxp/gic/gicv3/plat_gic.h
@@ -61,7 +61,6 @@
 
 #define GICR_ICENABLER0_SGI15   0x00008000
 #define GICR_CTLR_RWP           0x8
-#define GICR_CTLR_DPG0_MASK     0x2000000
 #define GICR_IGROUPR0_SGI15     0x00008000
 #define GICR_IGRPMODR0_SGI15    0x00008000
 #define GICR_ISENABLER0_SGI15   0x00008000