configs/roseapplypi_defconfig: really change to ext4 rootfs
Commit b8aebcfd823f83c16 (configs/roseapplypi_defconfig: bump kernel to
5.15.10) adjusted the board to use an ext4 rootfs, but forgot to update the
defconfig to enable ext4 rootfs, breaking the build. Correct that.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Peter Korsgaard