drm/amd/display: use swap() in sort()

Use existing swap() function rather than duplicating its implementation.

./drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_pmo/dml2_pmo_dcn3.c:17:29-30: WARNING opportunity for swap().

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9573
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/dml2/dml21/src/dml2_pmo/dml2_pmo_dcn3.c

@@ -7,16 +7,12 @@
 
 static void sort(double *list_a, int list_a_size)
 {
-	double temp;
 	// For all elements b[i] in list_b[]
 	for (int i = 0; i < list_a_size - 1; i++) {
 		// Find the first element of list_a that's larger than b[i]
 		for (int j = i; j < list_a_size - 1; j++) {
-			if (list_a[j] > list_a[j + 1]) {
-				temp = list_a[j];
-				list_a[j] = list_a[j + 1];
-				list_a[j + 1] = temp;
-			}
+			if (list_a[j] > list_a[j + 1])
+				swap(list_a[j], list_a[j + 1]);
 		}
 	}
 }