bnxt_en: support PPS in/out on all pins

bnxt_en: support PPS in/out on all pins

Add supported_extts_flags and supported_perout_flags configuration to make
the driver complaint with the latest API.

Initialize channel information to 0 to avoid confusing users, because HW
doesn't actually care about channels.

Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Link: https://patch.msgid.link/20251019225720.898550-1-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>