Allow smem to be optional for Qualcomm platforms by providing stub functions. Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org> Add remaining stub functions and use static inline: Signed-off-by: Simon Glass <sjg@chromium.org>