configs/qemu: fix and bump relevant kernel/header versions

Tweak the configs to deal with b155f5a5
fallout.
And bump to the latest kernel versions.

As of this commit the microblaze qemu targets seem broken, probably
because of commit 14e527eb or some qemu
limitation.

SPARC seems to have issues as well, the kernel seems to go down with an
unhandled exception with qemu 1.7.0

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>