ARM: shmobile: defconfig: Enable PWM

RZ/G1 and R-Car platforms have PWM timers. This patch enables PWM support
by default.
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/configs/shmobile_defconfig

@@ -208,6 +208,7 @@ CONFIG_STAGING_BOARD=y
 CONFIG_IIO=y
 CONFIG_AK8975=y
 CONFIG_PWM=y
+CONFIG_PWM_RCAR=y
 CONFIG_PWM_RENESAS_TPU=y
 CONFIG_GENERIC_PHY=y
 CONFIG_PHY_RCAR_GEN2=y