dts: bcm2712-rpi-cm5: Remove inaccessible USB_OC_N

Although VBUS_EN on GPIO42 appears on the CM5's 100-way headers,
USB_OC_N on GPIO43 does not. Remove the signal name to avoid further
confusion and disappointment.

Signed-off-by: Phil Elwell <[email protected]>

Author: pelwell

arch/arm64/boot/dts/broadcom/bcm2712-rpi-cm5.dtsi

@@ -718,7 +718,7 @@ spi10_cs_pins: &spi10_cs_gpio1 {};
 		"-", // GPIO40
 		"-", // GPIO41
 		"USB_VBUS_EN", // GPIO42
-		"USB_OC_N", // GPIO43
+		"-", // GPIO43
 		"RP1_STAT_LED", // GPIO44
 		"FAN_PWM", // GPIO45
 		"-", // GPIO46