rockchip: rk3328: Enable workaround for erratum 855873

Enable the workaround for Cortex-A53 erratum 855873 for the Rockchip
RK3328, silencing a warning at startup.

Change-Id: I5aa29d674d23c096c599abcb5e7dac970f9607d8
Signed-off-by: Simon South <simon@simonsouth.net>

plat/rockchip/rk3328/platform.mk

@@ -59,6 +59,9 @@ endif
 include lib/coreboot/coreboot.mk
 include lib/libfdt/libfdt.mk
 
+# Enable workarounds for selected Cortex-A53 errata
+ERRATA_A53_855873	:=	1
+
 $(eval $(call add_define,PLAT_EXTRA_LD_SCRIPT))
 $(eval $(call add_define,PLAT_SKIP_OPTEE_S_EL1_INT_REGISTER))