firmware: scmi: add a check against availability of protocols

Now that we have Base protocol support, we will be able to check if a given
protocol is really supported by the SCMI server (firmware).

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed