arm64: defconfig: enable rsu driver

Enable Intel Stratix10 Remote System Update (RSU) driver

The Intel Remote System Update (RSU) driver provides a way for customers
to update the boot configuration of a Intel Stratix 10 SoC device with
significantly reduced risk of corrupting the bitstream storage and
bricking the system.
Signed-off-by: Richard Gong <richard.gong@intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm64/configs/defconfig

@@ -90,6 +90,7 @@ CONFIG_ARM_TEGRA186_CPUFREQ=y
 CONFIG_ARM_SCPI_PROTOCOL=y
 CONFIG_RASPBERRYPI_FIRMWARE=y
 CONFIG_INTEL_STRATIX10_SERVICE=y
+CONFIG_INTEL_STRATIX10_RSU=m
 CONFIG_TI_SCI_PROTOCOL=y
 CONFIG_EFI_CAPSULE_LOADER=y
 CONFIG_IMX_SCU=y