ARM: dts: omap3-n900: Fix lp5523 for multi color

Since the LED multicolor framework support was added in commit
92a81562 ("leds: lp55xx: Add multicolor framework support to lp55xx")
LEDs on this platform stopped working.

Fixes: 92a81562 ("leds: lp55xx: Add multicolor framework support to lp55xx")
Fixes: ac219bf3

 ("leds: lp55xx: Convert to use GPIO descriptors")
Signed-off-by: Merlijn Wajer <merlijn@wizzup.org>
Signed-off-by: Sicelo A. Mhlongo <absicsz@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>