dmaengine: at_hdmac: add COMPILE_TEST support

Allows the buildbot to detect potential issues with the code on various
platforms.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Eugen Hristev <eugen.hristev@linaro.org>
Link: https://patch.msgid.link/20251106022405.85604-3-rosenp@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: neheb

drivers/dma/Kconfig

@@ -102,7 +102,7 @@ config ARM_DMA350
 
 config AT_HDMAC
 	tristate "Atmel AHB DMA support"
-	depends on ARCH_AT91
+	depends on ARCH_AT91 || COMPILE_TEST
 	select DMA_ENGINE
 	select DMA_VIRTUAL_CHANNELS
 	help