Add the MSPI controller support for apollo5x.
Add the MSPI controller to mspi API test.
Updated west.yml for hal updates.
Signed-off-by: Swift Tian <swift.tian@ambiq.com>
Add a MSPI controller API test and run on native_sim board.
The API implementation within mspi_emul.c is the test target.
The stub device emulator is added for convenience to test controllers.
Signed-off-by: Swift Tian <swift.tian@ambiq.com>