drivers: renesas: Move ddr/qos/qos header files

Move DDR/QoS/PFC header files, 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: I2cc0ceda8d05b6b8d95a69afdc233dc0d098e850

plat/renesas/rcar/platform.mk

@@ -302,6 +302,7 @@ PLAT_INCLUDES	+=	-Idrivers/renesas/rcar/ddr		\
 			-Idrivers/renesas/rcar/qos		\
 			-Idrivers/renesas/rcar/board		\
 			-Idrivers/renesas/rcar/cpld/		\
+			-Idrivers/renesas/common		\
 			-Idrivers/renesas/common/iic_dvfs	\
 			-Idrivers/renesas/common/avs		\
 			-Idrivers/renesas/common/delay		\