nitrogen6x: get rid of ext2 rev 1 notice now we can create it directly instead

And update the defconfig to do so.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

board/boundarydevices/nitrogen6x/readme.txt

@@ -2,13 +2,6 @@ Buildroot for Boundary Devices Nitrogen6X:
 
 http://boundarydevices.com/products/nitrogen6x-board-imx6-arm-cortex-a9-sbc/
 
-Notice: U-Boot as shipped on the board has a bug reading rev 0 ext2
-file systems (which is what genext2fs generates). To convert it to rev
-1, do:
-
-tune2fs -O filetype output/images/rootfs.ext2
-e2fsck -a output/images/rootfs.ext2
-
 To install, simply extract rootfs.ext2 to first partition of a uSD card:
 
 sudo dd if=output/images/rootfs.ext2 of=/dev/sdX1

configs/nitrogen6x_defconfig

@@ -9,6 +9,7 @@ BR2_ROOTFS_POST_BUILD_SCRIPT="board/boundarydevices/nitrogen6x/post-build.sh"
 
 # filesystem
 BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_2r1=y
 
 # bootloader
 BR2_TARGET_UBOOT=y