refactor(plat/soc-lx2160): move errata to common directory

Will add more Erratas, some errata can be used for multiple
platforms, so move errata to be common code which can
be share between different platforms.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: Ib149b3eac365bdb593331e9f38f0b89d92c9c0d1

plat/nxp/common/soc_errata/errata.c

@@ -415,4 +415,4 @@ void erratum_a050426(void)
 	mmio_write_32(0x700117E60, val3);
 	mmio_write_32(0x700117E90, val4);
 }
-#endif
+#endif /* ERRATA_SOC_A050426 */

plat/nxp/common/soc_errata/errata.mk

@@ -0,0 +1,22 @@
+#
+# Copyright 2021 NXP
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# Platform Errata Build flags.
+# These should be enabled by the platform if the erratum workaround needs to be
+# applied.
+
+ERRATA := \
+  ERRATA_SOC_A050426
+
+define add_errata_define
+  $(1) ?= 0
+  ifeq ($$($(1)),1)
+    $$(eval $$(call add_define,$(1)))
+  endif
+endef
+
+$(foreach e,$(ERRATA),$(eval $(call add_errata_define,$(e))))
+
+BL2_SOURCES += $(PLAT_COMMON_PATH)/soc_errata/errata.c

plat/nxp/soc-lx2160a/erratas_soc.mk

@@ -1,21 +0,0 @@
-#
-# Copyright 2020 NXP
-#
-# SPDX-License-Identifier: BSD-3-Clause
-#
-# Platform Errata Build flags.
-# These should be enabled by the platform if the erratum workaround needs to be
-# applied.
-
-# Flag to apply erratum 50426 workaround during reset.
-ERRATA_SOC_A050426	?= 0
-
-# Process ERRATA_SOC_A050426 flag
-ifeq (${ERRATA_SOC_A050426}, 1)
-INCL_SOC_ERRATA_SOURCES	:= yes
-$(eval $(call add_define,ERRATA_SOC_A050426))
-endif
-
-ifeq (${INCL_SOC_ERRATA_SOURCES},yes)
-BL2_SOURCES	+= 	${PLAT_SOC_PATH}/erratas_soc.c
-endif

plat/nxp/soc-lx2160a/soc.mk

@@ -138,7 +138,7 @@ endif
 include ${PLAT_DRIVERS_PATH}/drivers.mk
 
  # Adding SoC specific files
-include ${PLAT_SOC_PATH}/erratas_soc.mk
+include ${PLAT_COMMON_PATH}/soc_errata/errata.mk
 
 PLAT_INCLUDES		+=	${NV_STORAGE_INCLUDES}\
 				${WARM_RST_INCLUDES}