wifi: cfg80211: Remove the redundant wiphy_dev

There is no need to call wiphy_dev again.Simplifying the
code makes it more readable.

Signed-off-by: Zheng tan <tanzheng@kylinos.cn>
Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Link: https://patch.msgid.link/20250910015556.219298-1-tanzheng@kylinos.cn


Signed-off-by: Johannes Berg <johannes.berg@intel.com>