Staging: bcm: Rename all local variables in function GetNextTargetBufferLocation.

This patch renames all local variables in
function GetNextTargetBufferLocation for
readability purposes.

Signed-off-by: Kevin McKinney <klmckinney1@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>