mt76: mt7915: fix endian issues

stable inclusion
from stable-5.10.18
commit 977060d4ec5be132b8ec87713b7aa66a12a03089
bugzilla: 50148

--------------------------------

[ Upstream commit cee236e1 ]

Multiple MCU messages were using u16/u32 fields without endian annotations
or conversions

Fixes: e57b7901 ("mt76: add mac80211 driver for MT7915 PCIe-based chipsets")
Fixes: 5517f78b ("mt76: mt7915: enable firmware module debug support")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>