mt76: mt7615: fix rdd mcu cmd endianness

stable inclusion
from stable-5.10.18
commit f9d6533d18fd80412dc0450cf751ad144e698a23
bugzilla: 50148

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

[ Upstream commit 0211c282 ]

Similar to mt7915 driver, fix mt7615 radar mcu command endianness

Fixes: 2ce73efe ("mt76: mt7615: initialize radar specs from host driver")
Fixes: 70911d96 ("mt76: mt7615: add radar pattern test knob to debugfs")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
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>