allwinner: Enable workaround for Cortex-A53 erratum 1530924

BL31 reports the following warning during boot:

  WARNING: BL31: cortex_a53: CPU workaround for 1530924 was missing!

Resolve this by enabling the workaround on the affected platforms.

Change-Id: Ia1d5075370be5ae67b7bece96ec0069d9692b14c
Signed-off-by: Samuel Holland <samuel@sholland.org>

plat/allwinner/common/allwinner-common.mk

@@ -48,6 +48,7 @@ ENABLE_SVE_FOR_NS		:=	0
 ERRATA_A53_835769		:=	1
 ERRATA_A53_843419		:=	1
 ERRATA_A53_855873		:=	1
+ERRATA_A53_1530924		:=	1
 
 # The reset vector can be changed for each CPU.
 PROGRAMMABLE_RESET_ADDRESS	:=	1