ncsi: internal.h: Fix a spello

[ Upstream commit 195a8ec4 ]

s/Firware/Firmware/

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: 3084b58b ("net/ncsi: Fix netlink major/minor version numbers")
Signed-off-by: Sasha Levin <sashal@kernel.org>