imx: enable necessary errata for i.mx8mq

NXP's i.MX8MQ uses Cortex-A53 r0p4, enable necessary
erratas for it.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

plat/imx/imx8m/imx8mq/platform.mk

@@ -34,3 +34,7 @@ USE_COHERENT_MEM	:=	1
 RESET_TO_BL31		:=	1
 A53_DISABLE_NON_TEMPORAL_HINT := 0
 MULTI_CONSOLE_API	:=	1
+
+ERRATA_A53_835769	:=	1
+ERRATA_A53_843419	:=	1
+ERRATA_A53_855873	:=	1