drm/amd/display: Adding dpia debug bits for hpd delay

[Why]
Need to have dpia debug bits for configuring hpd delay.

[How]
Added hpd_delay_in_ms variable in dpia_debug_options.
Reviewed-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: meenakshikumar somasundaram <meenakshikumar.somasundaram@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -522,7 +522,8 @@ union dpia_debug_options {
 		uint32_t force_non_lttpr:1;
 		uint32_t extend_aux_rd_interval:1;
 		uint32_t disable_mst_dsc_work_around:1;
-		uint32_t reserved:28;
+		uint32_t hpd_delay_in_ms:12;
+		uint32_t reserved:16;
 	} bits;
 	uint32_t raw;
 };