staging: silicom: Remove needless calls of get_status_port_fn()

Remove a needless pointer initialisation and call to get_status_port_fn()
in functions remove_bypass_tpl_auto() and set_tpl_fn(). Variable
'pbpctl_dev_b' is set correctly later in the function before first use.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>