iwlwifi: fix min API version for 7265D, 3168, 8000 and 8265

In a previous commit, we removed support for API versions earlier than
22 for these NICs.  By mistake, the *_UCODE_API_MIN definitions were
set to 17.  Fix that.

Fixes: 4b87e5af ("iwlwifi: remove support for fw older than -17 and -22")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>