mac80211: ath11k: Remove regulatory intersection

mac80211: ath11k: Remove regulatory intersection

Currently, during initialization ath11k will receive a regulatory event
from the firmware in which it will receive the default regulatory domain
code and accompanying rules list and report those to the kernel.

Then if you try to change the regulatory domain to a different country code
it will do a weird thing in which it will send that to the FW and after
receiving the appropriate regulatory event it will parse the rules.
However, while its parsing there is a weird thing being done, and that is
that new raw rules from FW get intersected with the rules from the default
domain.
This is creating a big issue as the default domain is almost always set to
"US" or just "00" aka world so ath11k will unfairly limit you to the most
restrictive combination of rules based on the default domain and your
desired domain.
For example, in ETSI countries this is causing channels 12 and 13 on 2.4GHz
to not be usable since "US" limits 2.4GHz to 2472MHz instead of 2482MHz
like ETSI countries do.

So, lets do what TIP and even QCA do in their ath11k downstream tree and
completely get rid of the interesection code in ath11k.

Signed-off-by: Robert Marko <robimarko@gmail.com>