LFU-834-2 pinctrl: nxp: Add support for vendor defined pinctrl config

iMX94 has special muxing options for certain pins. Add new vendor
defined pinctrl type to SCMI pinctrl driver to handle these pins.
The MUX value field in the IOMUX table is extended to 16 bits where
the lower 8 bits represent the current IOMUX value and the upper
8 bits represent the new extended mux added in iMX94.

Signed-off-by: Ranjani Vaidyanathan <ranjani.vaidyanathan@nxp.com>
Acked-by: Peng Fan <peng.fan@nxp.com>

drivers/pinctrl/nxp/pinctrl-scmi.c

@@ -31,6 +31,8 @@
 #define PINCTRL_TYPE_CONFIG     193
 #define PINCTRL_TYPE_DAISY_ID   194
 #define PINCTRL_TYPE_DAISY_CFG  195
+#define PINCTRL_TYPE_EXT        196
+
 #define PINCTRL_NUM_CFGS_SHIFT  2
 
 static int imx_pinconf_scmi_set(struct udevice *dev, u32 mux_ofs, u32 mux, u32 config_val,
@@ -47,8 +49,13 @@ static int imx_pinconf_scmi_set(struct udevice *dev, u32 mux_ofs, u32 mux, u32 c
 	};
 	if (mux_ofs != 0) {
 		in.configs[num_cfgs].type = PINCTRL_TYPE_MUX;
-		in.configs[num_cfgs].val = mux;
+		in.configs[num_cfgs].val = mux & 0xFF;
 		num_cfgs++;
+		if (mux & 0xFF00){
+			in.configs[num_cfgs].type = PINCTRL_TYPE_EXT;
+			in.configs[num_cfgs].val = (mux & 0xFF00) >> 8;
+			num_cfgs++;
+		}
 	}
 	if (config_val != 0) {
 		in.configs[num_cfgs].type = PINCTRL_TYPE_CONFIG;