leds: syscon: Support 'reg' in addition to 'offset' for register address

The register-bit-led binding now also supports 'reg' in addition to
'offset' for the register address. Add support to the driver to get the
address from 'reg'.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20231025190619.881090-2-robh@kernel.orgSigned-off-by: Lee Jones <lee@kernel.org>

drivers/leds/leds-syscon.c

@@ -81,7 +81,8 @@ static int syscon_led_probe(struct platform_device *pdev)
 
 	sled->map = map;
 
-	if (of_property_read_u32(np, "offset", &sled->offset))
+	if (of_property_read_u32(np, "reg", &sled->offset) &&
+	    of_property_read_u32(np, "offset", &sled->offset))
 		return -EINVAL;
 	if (of_property_read_u32(np, "mask", &sled->mask))
 		return -EINVAL;