configs/rock5b: update to linux 6.11.3

configs/rock5b: update to linux 6.11.3

A bunch of new hardware has been enabled for rock5b in linux 6.11,
most notably USB3 host controller support, GPU support, cpufreq
support, and PCIe endpoint mode support.

Add the dependency on host python3 that is new since linux 6.10.

Also add the missing dependency on openssl (which has been needed for
a long time, since we are using arm64 defconfig, but only shows up as
an error if the host system doesn't have extract-cert installed.)

Signed-off-by: Niklas Cassel <[email protected]>
Signed-off-by: Thomas Petazzoni <[email protected]>