drm/amd/display: optimize code runtime a bit

In fnction is_cr_done & is_ch_eq_done, when done = false
happened once, no need to circle left ln_count.
This change is to make the code run a bit fast.
Signed-off-by: Bernard Zhao <bernard@vivo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

@@ -380,34 +380,30 @@ static void dpcd_set_lt_pattern_and_lane_settings(
 static bool is_cr_done(enum dc_lane_count ln_count,
 	union lane_status *dpcd_lane_status)
 {
-	bool done = true;
 	uint32_t lane;
 	/*LANEx_CR_DONE bits All 1's?*/
 	for (lane = 0; lane < (uint32_t)(ln_count); lane++) {
 		if (!dpcd_lane_status[lane].bits.CR_DONE_0)
-			done = false;
+			return false;
 	}
-	return done;
-
+	return true;
 }
 
 static bool is_ch_eq_done(enum dc_lane_count ln_count,
 	union lane_status *dpcd_lane_status,
 	union lane_align_status_updated *lane_status_updated)
 {
-	bool done = true;
 	uint32_t lane;
 	if (!lane_status_updated->bits.INTERLANE_ALIGN_DONE)
-		done = false;
+		return false;
 	else {
 		for (lane = 0; lane < (uint32_t)(ln_count); lane++) {
 			if (!dpcd_lane_status[lane].bits.SYMBOL_LOCKED_0 ||
 				!dpcd_lane_status[lane].bits.CHANNEL_EQ_DONE_0)
-				done = false;
+				return false;
 		}
 	}
-	return done;
-
+	return true;
 }
 
 static void update_drive_settings(