drm/amd/display: Simplify bool comparison

Fix the following coccicheck warning:

./drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h:319:11-23:
WARNING: Comparison to bool.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h

@@ -309,9 +309,9 @@ static inline bool should_set_clock(bool safe_to_lower, int calc_clk, int cur_cl
 static inline bool should_update_pstate_support(bool safe_to_lower, bool calc_support, bool cur_support)
 {
 	if (cur_support != calc_support) {
-		if (calc_support == true && safe_to_lower)
+		if (calc_support && safe_to_lower)
 			return true;
-		else if (calc_support == false && !safe_to_lower)
+		else if (!calc_support && !safe_to_lower)
 			return true;
 	}