at91: switch to Kernel 5.15 by default
Getting ready for the next release.
Claudiu said:
> I tested v5.15 on all targets I have access to previously, when
> updating OpenWrt kernel for v5.15 and when preparing this PR. (#11918)
Signed-off-by: Paul Spooren <[email protected]>
Reviewed-by: Claudiu Beznea <[email protected]>
Paul Spooren