configs/galileo: add CONFIG_LBDAF=y in the kernel configuration

configs/galileo: add CONFIG_LBDAF=y in the kernel configuration

Kernel help-text states, "The ext4 filesystem requires that this feature
be enabled <...> otherwise, it will refuse to mount in the read-write
mode any filesystems that use the huge_file feature, which is enabled by
default by mke2fs.ext4."

If the rootfs is to be (re)mounted rw at boot, this must be set for the
system to successfully come up.

Signed-off-by: Nicholas Sielicki <sielicki@yandex.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>