drm: bridge: nwl-dsi: Drop unused nwl_dsi_plat_clk_config

nwl_dsi_plat_clk_config structure added in below commit but not
used anywhere in the driver.

commit <44cfc623> ("drm/bridge: Add NWL MIPI DSI host controller
support")

Drop it.

Cc: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210704093433.27717-1-jagan@amarulasolutions.com

drivers/gpu/drm/bridge/nwl-dsi.c

@@ -48,12 +48,6 @@ enum transfer_direction {
 #define NWL_DSI_ENDPOINT_LCDIF 0
 #define NWL_DSI_ENDPOINT_DCSS 1
 
-struct nwl_dsi_plat_clk_config {
-	const char *id;
-	struct clk *clk;
-	bool present;
-};
-
 struct nwl_dsi_transfer {
 	const struct mipi_dsi_msg *msg;
 	struct mipi_dsi_packet packet;