drm/gem-fb-helper: Consistenly use drm_dbg_kms()

All debug messages in drm_gem_framebuffer_helper.c use drm_dbg_kms(),
except for one, which uses drm_dbg().
Replace the outlier by drm_dbg_kms() to restore consistency.

Fixes: c91acda3a380 ("drm/gem: Check for valid formats")
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Thomas Zimmermann <[e-mail]>
Reviewed-by: Maíra Canal <[e-mail]>
Signed-off-by: Javier Martinez Canillas <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/7d566[e-mail]

drivers/gpu/drm/drm_gem_framebuffer_helper.c

···
 	if (drm_drv_uses_atomic_modeset(dev) &&
 	    !drm_any_plane_has_format(dev, mode_cmd->pixel_format,
 				      mode_cmd->modifier[0])) {
-		drm_dbg(dev, "Unsupported pixel format %p4cc / modifier 0x%llx\n",
-			&mode_cmd->pixel_format, mode_cmd->modifier[0]);
+		drm_dbg_kms(dev, "Unsupported pixel format %p4cc / modifier 0x%llx\n",
+			    &mode_cmd->pixel_format, mode_cmd->modifier[0]);
 		return -EINVAL;
 	}