ARM: sunxi: Add A31 reset driver to sunxi_defconfig

Now that the A31 reset code is a driver of its own, we need it in the
defconfig.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/configs/sunxi_defconfig

@@ -52,6 +52,9 @@ CONFIG_I2C_MV64XXX=y
 CONFIG_SPI=y
 CONFIG_SPI_SUN6I=y
 CONFIG_GPIO_SYSFS=y
+CONFIG_POWER_SUPPLY=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_SUN6I=y
 # CONFIG_HWMON is not set
 CONFIG_WATCHDOG=y
 CONFIG_SUNXI_WATCHDOG=y