cxgb4: fix wrong shift.

stable inclusion
from stable-5.10.46
commit acc3589959757ed9d30bba38aa18161764ff4430
bugzilla: 168323
CVE: NA

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

[ Upstream commit 39eb0281 ]

While fixing coverity warning, commit dd2c7967 introduced typo in
shift value. Fix that.

Signed-off-by: Pavel Machek (CIP) <pavel@denx.de>
Fixes: dd2c7967 ("cxgb4: Fix unintentional sign extension issues")
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>