dts: nxp: mimx9596cvtxn-pinctrl: fix iomuxc node reference

Change to scmi_iomuxc to align with SCMI-based pinctrl used on i.MX 95
platforms

Signed-off-by: Aziz Sellami <[email protected]>

Author: asellaminxp

dts/nxp/nxp_imx/mimx9596cvtxn-pinctrl.dtsi

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024, NXP
+ * Copyright 2024-2025 NXP
  * SPDX-License-Identifier: Apache-2.0
  *
  * Note: File generated by gen_soc_headers.py
@@ -17,7 +17,7 @@
  * the pin based on the devicetree properties set
  */
 
-&iomuxc {
+&scmi_iomuxc {
 	/omit-if-no-ref/ iomuxc_ccm_clko1_ccmsrcgpcmix_clko_ccmsrcgpcmix_clko1: IOMUXC_CCM_CLKO1_CCMSRCGPCMIX_CLKO_CCMSRCGPCMIX_CLKO1 {
 		pinmux = <0x443c00a8 0 0x0 0 0x443c02ac>;
 	};