Staging: bcm: Remove typedef for _ETH_HEADER_STRUC and call directly.

This patch removes typedef for _ETH_HEADER_STRUC,
changes the name of the struct from
_ETH_HEADER_STRUC to bcm_eth_header.
In addition, any calls to the following typedefs
"ETH_HEADER_STRUC, *PETH_HEADER_STRUC" are
changed to call the struct directly.

Signed-off-by: Kevin McKinney <klmckinney1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>