qemuboot/runqemu: Fix 6.2 and later kernel network device naming

qemuboot/runqemu: Fix 6.2 and later kernel network device naming

With kernel 6.2 and later network devices are renamed by systemd. This does not
match with the current network device naming assumed in our configuration.

We may or may not change that naming but for now, pass the right kernel commandline
so things work as expected with newer kernels and removing a blocker on upgrading
to the 6.4 kernel by default.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>