drm/i915/display: use drm_print_hex_dump() for buffer mismatch dumps

drm/i915/display: use drm_print_hex_dump() for buffer mismatch dumps

Use the drm_printer based printer to get the device specific printing of
the hex dump, and avoid the manual loglevel hacking.

Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a536050b5f9dc2d7de32d29766c98477f58d746c.1733392101.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>