drm/msm/hdmi: drop empty bridge callbacks

Drop empty callbacks msm_hdmi_bridge_enable() and
msm_hdmi_bridge_disable().

Signed-off-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Stephen Boyd <[e-mail]>
Patchwork: https://patchwork.freedesktop.org/patch/489707/
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Baryshkov <[e-mail]>

drivers/gpu/drm/msm/hdmi/hdmi_bridge.c

···
 		msm_hdmi_hdcp_on(hdmi->hdcp_ctrl);
 }
 
-static void msm_hdmi_bridge_enable(struct drm_bridge *bridge)
-{
-}
-
-static void msm_hdmi_bridge_disable(struct drm_bridge *bridge)
-{
-}
-
 static void msm_hdmi_bridge_post_disable(struct drm_bridge *bridge)
 {
 	struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
···
 
 static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = {
 		.pre_enable = msm_hdmi_bridge_pre_enable,
-		.enable = msm_hdmi_bridge_enable,
-		.disable = msm_hdmi_bridge_disable,
 		.post_disable = msm_hdmi_bridge_post_disable,
 		.mode_set = msm_hdmi_bridge_mode_set,
 		.mode_valid = msm_hdmi_bridge_mode_valid,