qede: Fix sparse warnings

Solves the following warning in qede -
 - Several cases of missing cpu_to_le16() conversions
 - Adds 'static' to one function declaration
 - Removes dcbnl operation that's currently getting populated twice

Signed-off-by: Manish Chopra <Manish.Chopra@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>