feat(tf-coverity): add UART target in STM32MP1 configs

Add a configuration for compilation of UART boot device and
STM32CubeProgrammer support.

This patch depends on [1] to work.

[1] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/12249

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Change-Id: Iba84e8dfd67b9f30416efb0f6778e48ba1f75dad
1 file changed