Most targets upstream use 250Hz or even 1000Hz by default while
100Hz is hardcoded in OpenWrt's default config. Use upstream default
except for apm821xx which hardsets 1000Hz instead of platform default of
250Hz.
Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>
[Apply same changes to 5.4]
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>