arm64: defconfig: Enable SPI_SUN6I

Enable SUN6I SPI controller for Allwinner ARM64 SoC's.

This would helpful to setup spi flash, for another booting source.
mark it as static since it require during boot.
Signed-off-by: NJagan Teki <jagan@amarulasolutions.com>
Signed-off-by: NMaxime Ripard <maxime.ripard@bootlin.com>

arch/arm64/configs/defconfig

@@ -373,6 +373,7 @@ CONFIG_SPI_QUP=y
 CONFIG_SPI_S3C64XX=y
 CONFIG_SPI_SPIDEV=m
 CONFIG_SPI_NXP_FLEXSPI=y
+CONFIG_SPI_SUN6I=y
 CONFIG_SPMI=y
 CONFIG_PINCTRL_SINGLE=y
 CONFIG_PINCTRL_MAX77620=y