ARM: shmobile: Enable R-Mobile reset driver in multiplatform defconfig

This is used on R-Mobile APE6 (r8a73a4), R-Mobile A1 (r8a7740), and
SH-Mobile AG5 (sh73a0).
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/configs/shmobile_defconfig

@@ -110,6 +110,9 @@ CONFIG_SPI_SH_HSPI=y
 CONFIG_GPIO_EM=y
 CONFIG_GPIO_RCAR=y
 CONFIG_GPIO_PCF857X=y
+CONFIG_POWER_SUPPLY=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_RMOBILE=y
 # CONFIG_HWMON is not set
 CONFIG_THERMAL=y
 CONFIG_CPU_THERMAL=y