Staging: bcm: Remove typedef for IPV6AuthenticationHeaderFormatTag and call directly.

This patch removes typedef for IPV6AuthenticationHeaderFormatTag,
and changes the name of the struct to bcm_ipv6_authentication_hdr
In addition, any calls to typedef IPV6AuthenticationHeader, are
changed to call the struct directly.

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