net: remove SIOCSHWTSTAMP and SIOCGHWTSTAMP from ndo_eth_ioctl comment

net: remove SIOCSHWTSTAMP and SIOCGHWTSTAMP from ndo_eth_ioctl comment

Since commit 4ee58e1e5680 ("net: promote SIOCSHWTSTAMP and SIOCGHWTSTAMP
ioctls to dedicated handlers"), SIOCSHWTSTAMP and SIOCGHWTSTAMP are no
longer dispatched through dev_eth_ioctl() / ndo_eth_ioctl(). They are
now handled by their own dedicated functions dev_set_hwtstamp() and
dev_get_hwtstamp() in the ioctl path.

However, the comment describing ndo_eth_ioctl in netdevice.h still
lists these two ioctls, which is misleading for driver developers who
may incorrectly assume they need to handle hardware timestamping
commands in their ndo_eth_ioctl implementation.

Remove the stale references from the comment to accurately reflect that
ndo_eth_ioctl only handles SIOCGMIIPHY, SIOCGMIIREG and SIOCSMIIREG.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20260527120936.24169-1-xuanzhuo@linux.alibaba.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>