ptp: ocp: Remove redundant check in _signal_summary_show

In the function _signal_summary_show(), there is a NULL-check for
&bp->signal[nr], which cannot actually be NULL.

Therefore, this redundant check can be removed.

Signed-off-by: Ivan Abramov <i.abramov@mt-integration.ru>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20250305092520.25817-1-i.abramov@mt-integration.ru


Signed-off-by: Jakub Kicinski <kuba@kernel.org>