arm64: defconfig: enable camera on Thundercomm RB5 platform

Enable VIDEO_IMX412 and SM_CAMCC_825 to enable camera on Thundercomm RB5
platform.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221210194500.464556-2-dmitry.baryshkov@linaro.org