drivers: renesas: rom: Move to common

Move rom driver 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: I399dfb5eff186db76d26fa9c54bea88bee66789c

plat/renesas/common/common.mk

@@ -91,6 +91,7 @@ BL2_SOURCES	+=	${RCAR_GIC_SOURCES}				\
 			drivers/renesas/common/emmc/emmc_init.c		\
 			drivers/renesas/common/emmc/emmc_read.c		\
 			drivers/renesas/common/emmc/emmc_cmd.c		\
+			drivers/renesas/common/rom/rom_api.c		\
 			drivers/io/io_storage.c
 
 BL31_SOURCES	+=	${RCAR_GIC_SOURCES}				\

plat/renesas/rcar/platform.mk

@@ -305,7 +305,7 @@ PLAT_INCLUDES	+=	-Idrivers/renesas/rcar/ddr		\
 			-Idrivers/renesas/common/iic_dvfs	\
 			-Idrivers/renesas/rcar/avs		\
 			-Idrivers/renesas/common/delay		\
-			-Idrivers/renesas/rcar/rom		\
+			-Idrivers/renesas/common/rom		\
 			-Idrivers/renesas/common/scif		\
 			-Idrivers/renesas/common/emmc		\
 			-Idrivers/renesas/common/pwrc		\
@@ -325,7 +325,6 @@ BL2_SOURCES	+=	plat/renesas/rcar/aarch64/platform_common.c	\
 			drivers/renesas/rcar/dma/dma_driver.c		\
 			drivers/renesas/rcar/avs/avs_driver.c		\
 			drivers/renesas/rcar/watchdog/swdt.c		\
-			drivers/renesas/rcar/rom/rom_api.c		\
 			drivers/renesas/rcar/board/board.c
 
 BL31_SOURCES	+=	plat/renesas/rcar/plat_topology.c		\