as3645a: Use ams,input-max-microamp as documented in DT bindings

DT bindings document the property "ams,input-max-microamp" that limits the
chip's maximum input current. The driver and the DTS however used
"peak-current-limit" property. Fix this by using the property documented
in DT binding documentation.

Signed-off-by: Sakari Ailus <[e-mail]>
Acked-by: Pavel Machek <[e-mail]>
Signed-off-by: Jacek Anaszewski <[e-mail]>

arch/arm/boot/dts/omap3-n950-n9.dtsi

···
 			flash-timeout-us = <150000>;
 			flash-max-microamp = <320000>;
 			led-max-microamp = <60000>;
-			peak-current-limit = <1750000>;
+			ams,input-max-microamp = <1750000>;
 		};
 		indicator {
 			led-max-microamp = <10000>;

drivers/leds/leds-as3645a.c

···
 	of_property_read_u32(flash->flash_node, "voltage-reference",
 			     &cfg->voltage_reference);
 
-	of_property_read_u32(flash->flash_node, "peak-current-limit",
+	of_property_read_u32(flash->flash_node, "ams,input-max-microamp",
 			     &cfg->peak);
 	cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak);