configs/imx6ulpico: Bump to U-Boot 2016.09

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

configs/imx6ulpico_defconfig

@@ -36,7 +36,7 @@ BR2_PACKAGE_WPA_SUPPLICANT_PASSPHRASE=y
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_BOARDNAME="pico-imx6ul"
 BR2_TARGET_UBOOT_CUSTOM_VERSION=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2016.07"
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2016.09"
 BR2_TARGET_UBOOT_FORMAT_IMX=y
 
 # required tools to create the eMMC image