The boot-menu-add-entry script no longer exists. Remove it from
boot scripts.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Support for ext filesystems has been introduced recently. We can now
boot directly from our rootfs, loading the kernel and device tree
images from /boot.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Since we added a new partition in the board, the partitions number of
the boot and rootfs partition have changed as well.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The board variant found on the AT24 EEPROM holds the variant ID that we
can use to identify which expansion board we are running on and thus
which device tree to load and pass to the kernel.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The added complexity of bootargs-ip-* and bootargs-root-* makes
understanding defenv-2 more complicated. remove them and open
code the scripts instead in their users.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Brian Lilly <brian@crystalfontz.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>