arm64: defconfig: Enable RPC-IF support

Enable moduler support for the Renesas SPI Multi I/O Bus Controller
(RPC-IF), which is used on the Condor, Eagle, V3HSK, and V3MSK boards.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200819101240.12260-1-geert+renesas@glider.be

arch/arm64/configs/defconfig

@@ -458,6 +458,7 @@ CONFIG_SPI_MESON_SPIFC=m
 CONFIG_SPI_ORION=y
 CONFIG_SPI_PL022=y
 CONFIG_SPI_ROCKCHIP=y
+CONFIG_SPI_RPCIF=m
 CONFIG_SPI_QCOM_QSPI=m
 CONFIG_SPI_QUP=y
 CONFIG_SPI_QCOM_GENI=m
@@ -921,6 +922,7 @@ CONFIG_ARCH_K3_J721E_SOC=y
 CONFIG_TI_SCI_PM_DOMAINS=y
 CONFIG_EXTCON_USB_GPIO=y
 CONFIG_EXTCON_USBC_CROS_EC=y
+CONFIG_RENESAS_RPCIF=m
 CONFIG_IIO=y
 CONFIG_EXYNOS_ADC=y
 CONFIG_MAX9611=m