pinctrl: add support for more than 10 pin functions

Adding defines to support pins that have more than
10 pinmux options

Signed-off-by: Dylan Philpot <[email protected]>

Author: d-philpot

include/zephyr/dt-bindings/pinctrl/mspm0-pinctrl.h

@@ -21,6 +21,10 @@
 #define MSPM0_PIN_FUNCTION_9      (0x00000009)
 #define MSPM0_PIN_FUNCTION_10     (0x0000000A)
 #define MSPM0_PIN_FUNCTION_11     (0x0000000B)
+#define MSPM0_PIN_FUNCTION_12     (0x0000000C)
+#define MSPM0_PIN_FUNCTION_13     (0x0000000D)
+#define MSPM0_PIN_FUNCTION_14     (0x0000000E)
+#define MSPM0_PIN_FUNCTION_15     (0x0000000F)
 
 /* Creates a concatenation of the correct pin function based on the pin control
  * management register offset and the function suffix.