wifi: mt76: add memory barrier to SDIO queue kick

wifi: mt76: add memory barrier to SDIO queue kick

[ Upstream commit 8088cad892dcf228e042f3e43ef4ca21f1861d45 ]

Ensure the entry has been fully updated before SDIO bus worker access
it. This patch would fix potential memory risk in both mt7663s and
mt7921s.

Fixes: 761288617e13 ("mt76: sdio: move common code in mt76_sdio module")
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>