drm/amd/display: Fix typo in get_pixel_rate_div

[Why & How]
Some FIFO errors still occur due to reading wrong pixel rate divider.
Fix typo to prevent FIFO error.
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Taimur Hassan <Syed.Hassan@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c

@@ -76,7 +76,7 @@ static void dccg314_get_pixel_rate_div(
 	case 3:
 		REG_GET_2(OTG_PIXEL_RATE_DIV,
 			OTG3_PIXEL_RATE_DIVK1, &val_k1,
-			OTG3_PIXEL_RATE_DIVK2, &val_k1);
+			OTG3_PIXEL_RATE_DIVK2, &val_k2);
 		break;
 	default:
 		BREAK_TO_DEBUGGER();