drm/amd/display: remove possible condition with no effect (if == else)

Conditional statements have no effect to next process.So remove it.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2028Reported-by: NAbaci Robot <abaci@linux.alibaba.com>
Signed-off-by: NYang Li <yang.lee@linux.alibaba.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c

@@ -4663,10 +4663,6 @@ void dml32_CalculateMinAndMaxPrefetchMode(
 	} else if (AllowForPStateChangeOrStutterInVBlankFinal == dm_prefetch_support_uclk_fclk_and_stutter) {
 		*MinPrefetchMode = 0;
 		*MaxPrefetchMode = 0;
-	} else if (AllowForPStateChangeOrStutterInVBlankFinal ==
-			dm_prefetch_support_uclk_fclk_and_stutter_if_possible) {
-		*MinPrefetchMode = 0;
-		*MaxPrefetchMode = 3;
 	} else {
 		*MinPrefetchMode = 0;
 		*MaxPrefetchMode = 3;