plat: renesas: aarch64: Move to common

Move plat aarch64 code to common directory, so that the same
code can be re-used by both R-Car Gen3 and RZ/G2 platforms.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Change-Id: I66265e5e68bfcf5c3534965fb3549a145c782b47

plat/renesas/common/common.mk

@@ -78,6 +78,8 @@ BL2_SOURCES	+=	${RCAR_GIC_SOURCES}				\
 			lib/cpus/aarch64/cortex_a57.S			\
 			${LIBFDT_SRCS}					\
 			common/desc_image_load.c			\
+			plat/renesas/common/aarch64/platform_common.c	\
+			plat/renesas/common/aarch64/plat_helpers.S	\
 			drivers/renesas/common/console/rcar_printf.c	\
 			drivers/renesas/common/scif/scif.S		\
 			drivers/renesas/common/common.c			\
@@ -103,6 +105,8 @@ BL31_SOURCES	+=	${RCAR_GIC_SOURCES}				\
 			lib/cpus/aarch64/cortex_a53.S			\
 			lib/cpus/aarch64/cortex_a57.S			\
 			plat/common/plat_psci_common.c			\
+			plat/renesas/common/aarch64/plat_helpers.S	\
+			plat/renesas/common/aarch64/platform_common.c	\
 			drivers/renesas/common/console/rcar_console.S	\
 			drivers/renesas/common/console/rcar_printf.c	\
 			drivers/renesas/common/delay/micro_delay.c	\

plat/renesas/rcar/platform.mk

@@ -312,9 +312,7 @@ PLAT_INCLUDES	+=	-Idrivers/renesas/rcar/ddr		\
 			-Idrivers/renesas/common/pwrc		\
 			-Idrivers/renesas/common/io
 
-BL2_SOURCES	+=	plat/renesas/rcar/aarch64/platform_common.c	\
-			plat/renesas/rcar/aarch64/plat_helpers.S	\
-			plat/renesas/rcar/bl2_interrupt_error.c		\
+BL2_SOURCES	+=	plat/renesas/rcar/bl2_interrupt_error.c		\
 			plat/renesas/rcar/bl2_secure_setting.c		\
 			plat/renesas/rcar/bl2_plat_setup.c		\
 			plat/renesas/rcar/plat_storage.c		\
@@ -324,8 +322,6 @@ BL2_SOURCES	+=	plat/renesas/rcar/aarch64/platform_common.c	\
 			drivers/renesas/rcar/board/board.c
 
 BL31_SOURCES	+=	plat/renesas/rcar/plat_topology.c		\
-			plat/renesas/rcar/aarch64/plat_helpers.S	\
-			plat/renesas/rcar/aarch64/platform_common.c	\
 			plat/renesas/rcar/bl31_plat_setup.c		\
 			plat/renesas/rcar/plat_pm.c