drm/amd/pp: Mark internal functions as static in rv_smumgr.c

Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NRex Zhu <Rex.Zhu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/smumgr/rv_smumgr.c

@@ -60,7 +60,7 @@ static uint32_t rv_wait_for_response(struct pp_hwmgr *hwmgr)
 	return cgs_read_register(hwmgr->device, reg);
 }
 
-int rv_send_msg_to_smc_without_waiting(struct pp_hwmgr *hwmgr,
+static int rv_send_msg_to_smc_without_waiting(struct pp_hwmgr *hwmgr,
 		uint16_t msg)
 {
 	uint32_t reg;
@@ -82,7 +82,7 @@ static int rv_read_arg_from_smc(struct pp_hwmgr *hwmgr)
 	return cgs_read_register(hwmgr->device, reg);
 }
 
-int rv_send_msg_to_smc(struct pp_hwmgr *hwmgr, uint16_t msg)
+static int rv_send_msg_to_smc(struct pp_hwmgr *hwmgr, uint16_t msg)
 {
 	uint32_t reg;
 
@@ -101,7 +101,7 @@ int rv_send_msg_to_smc(struct pp_hwmgr *hwmgr, uint16_t msg)
 }
 
 
-int rv_send_msg_to_smc_with_parameter(struct pp_hwmgr *hwmgr,
+static int rv_send_msg_to_smc_with_parameter(struct pp_hwmgr *hwmgr,
 		uint16_t msg, uint32_t parameter)
 {
 	uint32_t reg;