iwlwifi: read and print OTP minor version

Sometimes it can be useful to know the OTP minor version, so read it
from the register and print it out.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220130115024.a90a1363558e.Ifc08db91cdc7d2e8353af55afaf899e10b2ef875@changeid


Signed-off-by: Luca Coelho <luciano.coelho@intel.com>