mt76: move shared mcu_calibrate routine in mt76x02-lib module

Move mcu_calibrate routine in mt76x02-lib module since it is
shared between USB and PCI code. Moreover remove duplicated
code

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
11 files changed