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

This patch removes typedef for _E_IPADDR_CONTEXT, and changes
the name of the enum to bcm_ipaddr_context. In addition,
any calls to enum E_IPADDR_CONTEXT are changed to call
directly.

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