imx6ulevk: fix LCD_nPWREN setting

Q901 is PMOS, LCD_nPWREN should be at low voltage then output is 3V3.
If LCD_nPWREN is high, output is 2.4V which is not correct.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>

board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c

@@ -117,7 +117,7 @@ static enum qn_level seq[3][2] = {
 
 static enum qn_func qn_output[8] = {
 	qn_reset, qn_reset, qn_reset, qn_enable, qn_disable, qn_reset,
-	qn_disable, qn_enable
+	qn_disable, qn_disable
 };
 
 static void iox74lv_init(void)