`checkpatch.pl` requires that dts sources are indented with tabs,
fix all the spaces that slipped in while checkpatch wasn't watching.
Signed-off-by: Jordan Yates <jordan@embeint.com>
The mspi flash test is intended to test mspi flash device driver
implementation on MSPI bus. The test requires the device to have at
least two sectors of memory with MSPI_FLASH_SECTOR_SIZE as size.
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>
