nl80211: Ignore global regulatory change for self managed drivers

nl80211: Ignore global regulatory change for self managed drivers

For drivers with self managed regulatory support enabled, private
regdomain is the only valid domain. Hence, ignore the global regulatory
domain change event (NL80211_CMD_REG_CHANGE) if the driver is enabled
with self managed regulatory domain, as the regulatory domain for those
drivers will be updated via NL80211_CMD_WIPHY_REG_CHANGE.

Signed-off-by: Manish Dharanenthiran <manish.dharanenthiran@oss.qualcomm.com>