drm/amd/display: Refactor program watermark.

Refactor programming watermark function:
Divided into urgent watermark, stutter watermark and pstate watermark.
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubbub.c

@@ -294,7 +294,7 @@ bool hubbub2_get_dcc_compression_cap(struct hubbub *hubbub,
 	return true;
 }
 
-static void hubbub2_setup_vmid_ptb(struct hubbub *hubbub,
+void hubbub2_setup_vmid_ptb(struct hubbub *hubbub,
 		uint64_t ptb,
 		uint8_t vmid)
 {

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubbub.h

@@ -102,4 +102,8 @@ void hubbub2_get_dchub_ref_freq(struct hubbub *hubbub,
 void hubbub2_wm_read_state(struct hubbub *hubbub,
 		struct dcn_hubbub_wm *wm);
 
+void hubbub2_setup_vmid_ptb(struct hubbub *hubbub,
+		uint64_t ptb,
+		uint8_t vmid);
+
 #endif