arm64: defconfig: Enable SM8250 GCC driver

Enable the SM8250 GCC driver so that we can boot to shell with defconfig

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20200424102943.2368764-1-vkoul@kernel.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>