wifi: mt76: mt7996: advertize beacon_int_min_gcd

Advertize beacon_int_min_gcd as 100 to allow setting different beacon
intervals on different interfaces.

Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Link: https://patch.msgid.link/20240816094635.2391-4-shayne.chen@mediatek.com


Signed-off-by: Felix Fietkau <nbd@nbd.name>