drm/amd/display: Clean up some inconsistent indenting

No functional modification involved.

smatch warnings:

drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_mpc.c:305 mpc20_get_ogam_current() warn: inconsistent indenting.
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/dcn20/dcn20_mpc.c

@@ -299,24 +299,24 @@ static enum dc_lut_mode mpc20_get_ogam_current(struct mpc *mpc, int mpcc_id)
 	uint32_t state_mode;
 	struct dcn20_mpc *mpc20 = TO_DCN20_MPC(mpc);
 
-	REG_GET(MPCC_OGAM_LUT_RAM_CONTROL[mpcc_id],
-			MPCC_OGAM_CONFIG_STATUS, &state_mode);
-
-		switch (state_mode) {
-		case 0:
-			mode = LUT_BYPASS;
-			break;
-		case 1:
-			mode = LUT_RAM_A;
-			break;
-		case 2:
-			mode = LUT_RAM_B;
-			break;
-		default:
-			mode = LUT_BYPASS;
-			break;
-		}
-		return mode;
+	REG_GET(MPCC_OGAM_LUT_RAM_CONTROL[mpcc_id], MPCC_OGAM_CONFIG_STATUS, &state_mode);
+
+	switch (state_mode) {
+	case 0:
+		mode = LUT_BYPASS;
+		break;
+	case 1:
+		mode = LUT_RAM_A;
+		break;
+	case 2:
+		mode = LUT_RAM_B;
+		break;
+	default:
+		mode = LUT_BYPASS;
+		break;
+	}
+
+	return mode;
 }
 
 static void mpc2_program_lutb(struct mpc *mpc, int mpcc_id,