drivers: gpu: Move prototype declaration to header file radeon_mode.h

Move prototype declaration of functions radeon_add_atom_connector() and
radeon_add_legacy_connector() to header file drm/radeon/radeon_mode.h
because  they are used by more than one file.

This eliminates the following warning in drm/radeon/radeon_connectors.c:
drivers/gpu/drm/radeon/radeon_connectors.c:1588:1: warning: no previous prototype for ‘radeon_add_atom_connector’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/radeon_connectors.c:2020:1: warning: no previous prototype for ‘radeon_add_legacy_connector’ [-Wmissing-prototypes]

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_atombios.c

@@ -39,18 +39,6 @@ extern void
 radeon_add_atom_encoder(struct drm_device *dev, uint32_t encoder_enum,
 			uint32_t supported_device, u16 caps);
 
-/* from radeon_connector.c */
-extern void
-radeon_add_atom_connector(struct drm_device *dev,
-			  uint32_t connector_id,
-			  uint32_t supported_device,
-			  int connector_type,
-			  struct radeon_i2c_bus_rec *i2c_bus,
-			  uint32_t igp_lane_info,
-			  uint16_t connector_object_id,
-			  struct radeon_hpd *hpd,
-			  struct radeon_router *router);
-
 /* from radeon_legacy_encoder.c */
 extern void
 radeon_add_legacy_encoder(struct drm_device *dev, uint32_t encoder_enum,

drivers/gpu/drm/radeon/radeon_combios.c

@@ -43,16 +43,6 @@ radeon_get_encoder_enum(struct drm_device *dev, uint32_t supported_device,
 			uint8_t dac);
 extern void radeon_link_encoder_connector(struct drm_device *dev);
 
-/* from radeon_connector.c */
-extern void
-radeon_add_legacy_connector(struct drm_device *dev,
-			    uint32_t connector_id,
-			    uint32_t supported_device,
-			    int connector_type,
-			    struct radeon_i2c_bus_rec *i2c_bus,
-			    uint16_t connector_object_id,
-			    struct radeon_hpd *hpd);
-
 /* from radeon_legacy_encoder.c */
 extern void
 radeon_add_legacy_encoder(struct drm_device *dev, uint32_t encoder_enum,

drivers/gpu/drm/radeon/radeon_mode.h

@@ -624,6 +624,26 @@ struct atom_voltage_table
 	struct atom_voltage_table_entry entries[MAX_VOLTAGE_ENTRIES];
 };
 
+
+extern void
+radeon_add_atom_connector(struct drm_device *dev,
+			  uint32_t connector_id,
+			  uint32_t supported_device,
+			  int connector_type,
+			  struct radeon_i2c_bus_rec *i2c_bus,
+			  uint32_t igp_lane_info,
+			  uint16_t connector_object_id,
+			  struct radeon_hpd *hpd,
+			  struct radeon_router *router);
+extern void
+radeon_add_legacy_connector(struct drm_device *dev,
+			    uint32_t connector_id,
+			    uint32_t supported_device,
+			    int connector_type,
+			    struct radeon_i2c_bus_rec *i2c_bus,
+			    uint16_t connector_object_id,
+			    struct radeon_hpd *hpd);
+
 extern enum radeon_tv_std
 radeon_combios_get_tv_info(struct radeon_device *rdev);
 extern enum radeon_tv_std