net: hns3: remove redundant initialization of pointer 'client'

The pointer 'client' is being initialized with a value that is never
read, it is being updated later on. The initialization is redundant
and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>