drm/imx/dcss: Enable COMPILE_TEST on all architectures

To extend test coverage, relax the dependency on ARCH_MXC and ARM64 to
also enable compilation when COMPILE_TEST is selected.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

drivers/gpu/drm/imx/dcss/Kconfig

@@ -3,7 +3,8 @@ config DRM_IMX_DCSS
 	select IMX_IRQSTEER
 	select DRM_KMS_CMA_HELPER
 	select VIDEOMODE_HELPERS
-	depends on DRM && ARCH_MXC && ARM64
+	depends on DRM
+	depends on (ARCH_MXC && ARM64) || COMPILE_TEST
 	help
 	  Choose this if you have a NXP i.MX8MQ based system and want to use the
 	  Display Controller Subsystem. This option enables DCSS support.