fix(plat/rcar3): fix source file to make about GICv2

Changed the plat/renesas/common/common.mk to change the source files
about GICv2 by include gicv2.mk, because gic_common.c has deprecated.

Signed-off-by: Hideyuki Nitta <hideyuki.nitta.jf@hitachi.com>
Signed-off-by: Toshiyuki Ogasahara <toshiyuki.ogasahara.bo@hitachi.com>
Signed-off-by: Yoshifumi Hosoya <yoshifumi.hosoya.wj@renesas.com>
Change-Id: Iaa7eae6b2c1dd79a05339325e6bc422d87bce49e
1 file changed