drm/stm: dsi: Constify phy ops structure

Constify dw_mipi_dsi_stm_phy_ops as these ops are not supposed
to change at runtime.

Signed-off-by: Philippe CORNU <[email protected]>
Reviewed-by: Benjamin Gaignard <[email protected]>
Signed-off-by: Benjamin Gaignard <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: pcornu

drivers/gpu/drm/stm/dw_mipi_dsi-stm.c

@@ -261,7 +261,7 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, struct drm_display_mode *mode,
 	return 0;
 }
 
-static struct dw_mipi_dsi_phy_ops dw_mipi_dsi_stm_phy_ops = {
+static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_stm_phy_ops = {
 	.init = dw_mipi_dsi_phy_init,
 	.get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
 };