ARM: shmobile: Enable PHY_RCAR_GEN3_USB2 in shmobile_defconfig

Enable PHY_RCAR_GEN3_USB2 in shmobile_defconfig so that boards
based on RZ/G1C SoC design can use the corresponding driver.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/configs/shmobile_defconfig

@@ -197,6 +197,7 @@ CONFIG_PWM_RENESAS_TPU=y
 CONFIG_RESET_CONTROLLER=y
 CONFIG_GENERIC_PHY=y
 CONFIG_PHY_RCAR_GEN2=y
+CONFIG_PHY_RCAR_GEN3_USB2=y
 # CONFIG_DNOTIFY is not set
 CONFIG_MSDOS_FS=y
 CONFIG_VFAT_FS=y