configs/kontron_smarc_sal28: use U-Boot 2022.10

Add BR2_TARGET_UBOOT_NEEDS_GNUTLS=y and BR2_TARGET_UBOOT_NEEDS_UTIL_LINUX=y
since this are dependencies for building mkeficapsule u-boot tool.

Change the offset of the rootfs to left enough space for the U-Boot that
has increased.

Cc: Michael Walle <michael@walle.cc>
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>