drm/imx/dcss: include drm/drm_bridge.h header

Compile-testing random configurations leads to failures in
dcss-kms.c from a missing declaration:

drivers/gpu/drm/imx/dcss/dcss-kms.c:95:8: error: use of undeclared identifier 'drm_bridge_attach'
95 | ret = drm_bridge_attach(encoder, bridge, NULL,
| ^
drivers/gpu/drm/imx/dcss/dcss-kms.c:96:5: error: use of undeclared identifier 'DRM_BRIDGE_ATTACH_NO_CONNECTOR'
96 | DRM_BRIDGE_ATTACH_NO_CONNECTOR);
| ^

Include the header directly.

Fixes: 004555a18d57 ("drm/imx/dcss: Allow build with COMPILE_TEST=y")
Signed-off-by: Arnd Bergmann <[e-mail]>
Signed-off-by: Dave Airlie <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/imx/dcss/dcss-kms.c

···
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_bridge_connector.h>
 #include <drm/drm_client_setup.h>
 #include <drm/drm_drv.h>