configs/imx6ulpico: Select BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV

BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV allows the Broadcom wireless driver
to be automatically loaded on boot.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/imx6ulpico_defconfig

@@ -25,6 +25,9 @@ BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx6ul-pico-hobbit"
 BR2_PACKAGE_LINUX_FIRMWARE=y
 BR2_PACKAGE_LINUX_FIRMWARE_BRCM_BCM43XX=y
 
+# For automatic firmware loading
+BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV=y
+
 # wireless packages
 BR2_PACKAGE_WIRELESS_TOOLS=y
 BR2_PACKAGE_WPA_SUPPLICANT=y