wifi: mt76: mt7996: fix register mapping

wifi: mt76: mt7996: fix register mapping

Bypass the entry when ofs is equal to dev->reg.map[i].size.
Without this patch, it would get incorrect register mapping when the CR
address is located at the boundary of an entry.

Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices")
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Shengyu Qu <wiagn233@outlook.com>
Link: https://patch.msgid.link/OSZPR01MB84344FEFF53004B5CF40BCC198132@OSZPR01MB8434.jpnprd01.prod.outlook.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>