ixp4xx: select CONFIG_BLK_DEV_LOOP
The ixp4xx is using split squashfs/jffs2 root filesystems on
some devices, so without CONFIG_BLK_DEV_LOOP the device does
not gain a writeable root filesystem with these boot messages:
mount_root: unable to create loop device
mount_root: jffs2 not ready yet, using temporary tmpfs overlay
and then it never gets out of that. Fix this so we get writeable
rootfs again.
Link: https://github.com/openwrt/openwrt/pull/21749
Signed-off-by: Linus Walleij <[email protected]>
Linus Walleij