Staging: bcm: Remove typedef for _ETH_CS_ETH2_FRAME and call directly.

This patch removes typedef for _ETH_CS_ETH2_FRAME, and
changes the name of the struct to bcm_ethernet2_frame. In
addition, any calls to struct "ETH_CS_ETH2_FRAME" are
changed to call directly.

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