dmaengine: st_fdma: add COMPILE_TEST support
Add COMPILE_TEST as an option to allow test building the driver.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20251106022015.84970-3-rosenp@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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