drm/amd/display: make hubp1_wait_pipe_read_start() static

It's a local function, let's make it static.

AGD: remove prototype in dcn10_hubp.h
Signed-off-by: Tales Lelo da Aparecida <tales.aparecida@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c

@@ -1316,7 +1316,7 @@ void hubp1_set_flip_int(struct hubp *hubp)
  *
  * @hubp: hubp struct reference.
  */
-void hubp1_wait_pipe_read_start(struct hubp *hubp)
+static void hubp1_wait_pipe_read_start(struct hubp *hubp)
 {
 	struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp);
 

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.h

@@ -790,6 +790,5 @@ bool hubp1_in_blank(struct hubp *hubp);
 void hubp1_soft_reset(struct hubp *hubp, bool reset);
 
 void hubp1_set_flip_int(struct hubp *hubp);
-void hubp1_wait_pipe_read_start(struct hubp *hubp);
 
 #endif