drm: rename drm_dp_i2c_helper.c to drm_dp_helper.c

I want to move some dp link training helpers into this place, so in
the future this won't be just about i2c any longer.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/Makefile

@@ -19,7 +19,7 @@ drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
 
 drm-usb-y   := drm_usb.o
 
-drm_kms_helper-y := drm_fb_helper.o drm_crtc_helper.o drm_dp_i2c_helper.o
+drm_kms_helper-y := drm_fb_helper.o drm_crtc_helper.o drm_dp_helper.o
 drm_kms_helper-$(CONFIG_DRM_LOAD_EDID_FIRMWARE) += drm_edid_load.o
 drm_kms_helper-$(CONFIG_DRM_KMS_CMA_HELPER) += drm_fb_cma_helper.o
 

drivers/gpu/drm/drm_dp_i2c_helper.c → drivers/gpu/drm/drm_dp_helper.c

@@ -37,7 +37,7 @@ i2c_algo_dp_aux_transaction(struct i2c_adapter *adapter, int mode,
 {
 	struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
 	int ret;
-	
+
 	ret = (*algo_data->aux_ch)(adapter, mode,
 				   write_byte, read_byte);
 	return ret;
@@ -182,7 +182,6 @@ i2c_dp_aux_reset_bus(struct i2c_adapter *adapter)
 {
 	(void) i2c_algo_dp_aux_address(adapter, 0, false);
 	(void) i2c_algo_dp_aux_stop(adapter, false);
-					   
 }
 
 static int
@@ -198,7 +197,7 @@ int
 i2c_dp_aux_add_bus(struct i2c_adapter *adapter)
 {
 	int error;
-	
+
 	error = i2c_dp_aux_prepare_bus(adapter);
 	if (error)
 		return error;