leds: aat1290: Fix property naming of flash-timeout-us

flash-timeout-us property name is changed to flash-max-timeout-us.
This patch fixes that name.
Signed-off-by: NIngi Kim <ingi2.kim@samsung.com>
Signed-off-by: NJacek Anaszewski <j.anaszewski@samsung.com>

Documentation/devicetree/bindings/leds/leds-aat1290.txt

@@ -27,7 +27,7 @@ Required properties of the LED child node:
 - flash-max-microamp : see Documentation/devicetree/bindings/leds/common.txt
                        Maximum flash LED supply current can be calculated using
                        following formula: I = 1A * 162kohm / Rset.
-- flash-timeout-us : see Documentation/devicetree/bindings/leds/common.txt
+- flash-max-timeout-us : see Documentation/devicetree/bindings/leds/common.txt
                          Maximum flash timeout can be calculated using following
                          formula: T = 8.82 * 10^9 * Ct.
 
@@ -54,7 +54,7 @@ aat1290 {
 		label = "aat1290-flash";
 		led-max-microamp = <520833>;
 		flash-max-microamp = <1012500>;
-		flash-timeout-us = <1940000>;
+		flash-max-timeout-us = <1940000>;
 	};
 };