r8152: replace get_protocol with vlan_get_protocol
r8152: replace get_protocol with vlan_get_protocol

vlan_get_protocol() has been defined and use it to replace
get_protocol().

Signed-off-by: Hayes Wang <2e4abddca5cd1005ec71becebc17a5257b0bced7@realtek.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs