arm64: dts: ti: k3-pinctrl: Define a generic GPIO MUX Mode

Introduce a GPIO mux mode macro for easier readability. All K3 devices
use mux mode 7 to switch to GPIO mux and this allows the gpio-ranges to
be defined for pinctrl-single clearly.
Signed-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20240627162539.691223-2-nm@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-pinctrl.h

@@ -38,6 +38,9 @@
 #define PIN_DEBOUNCE_CONF5	(5 << DEBOUNCE_SHIFT)
 #define PIN_DEBOUNCE_CONF6	(6 << DEBOUNCE_SHIFT)
 
+/* Default mux configuration for gpio-ranges to use with pinctrl */
+#define PIN_GPIO_RANGE_IOPAD	(PIN_INPUT | 7)
+
 #define AM62AX_IOPAD(pa, val, muxmode)		(((pa) & 0x1fff)) ((val) | (muxmode))
 #define AM62AX_MCU_IOPAD(pa, val, muxmode)	(((pa) & 0x1fff)) ((val) | (muxmode))