kirkwood: update config for kernel 5.10

Update config with make kernel_oldconfig.

CONFIG_SATA_PMP=y is added manually as done for 5.4.
This should be resolved properly in a separate issue.

Signed-off-by: Sungbo Eo <mans0n@gorani.run>
[add back CONFIG_SATA_PMP, rebase/refresh]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>