BACKPORT: UPSTREAM: soc: qcom: smd-rpm: Add QCS404 compatible

This patch adds a compatible for the rpm on the Qualcomm QCS404 platform.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
(cherry picked from commit b7e38617
https://github.com/torvalds/linux.git

)
Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@linaro.org>