staging: imx-drm-core: replace drm_get_connector_name() with direct name field use

Generated using semantic patch:

@@
expression E;
@@

- drm_get_connector_name(E)
+ E->name

Acked-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --cc drivers/staging/imx-drm/imx-drm-core.c
Simple merge