[Buildroot] [PATCH] imx6ulevk: readme: Update the rootfs type to ext4

[Peter Korsgaard]

>>>>> "Fabio" == Fabio Estevam <festevam at gmail.com> writes:

 > Since commit 2f37ef48e82e3ba ("configs/imx6ulevk: Use ext4 as filesystem type")
 > the rootfs type is ext4, so update the readme.txt accordingly.

 > Signed-off-by: Fabio Estevam <festevam at gmail.com>

Committed, thanks.

-- 
Venlig hilsen,
Peter Korsgaard