Create iwlwifi-mvm-firmware subpackage and fold some subpackages into it
    
    The remaining splitted iwl*-firmware packages does not follow a logical
    pattern. We have firmware for iwl 7xxx/8xxx/9xxx devices provided by
    iwl7260-firmware, which for some devices mean a somewhat misleading
    package name. Then, a single set of firmware for 3160/3168 devices
    are provided in the iwl3160-firmware package. And the remaining firmware
    is provided through iwlax2xx-firmware.
    
    Looking at the iwlwifi source in linux, we have this at iwlwifi/Makefile:
    
    iwlwifi-$(CONFIG_IWLMVM) += cfg/7000.o cfg/8000.o cfg/9000.o cfg/22000.o
    
    Where the driver seems to group devices which uses the called MVM
    firmware under a single umbrella. Some of these devices are:
    
    cfg/7000
    iwlwifi-3160-*.ucode    - Intel(R) Dual Band Wireless AC 3160
                              Intel(R) Dual Band Wireless N 3160
                              Intel(R) Wireless N 3160
    iwlwifi-3168-*.ucode    - Intel(R) Dual Band Wireless AC 3168
    iwlwifi-7260-*.ucode    - Intel(R) Dual Band Wireless AC/N 7260
                              Intel(R) Wireless N 7260
    iwlwifi-7265-*.ucode    - Intel(R) Dual Band Wireless AC/N 7265
                              Intel(R) Wireless N 7265
    iwlwifi-7265D-*.ucode   - Intel(R) Dual Band Wireless AC 3165
                              Intel(R) Dual Band Wireless AC/N 7265
                              Intel(R) Wireless N 7265
    
    cfg/8000
    iwlwifi-8000C-*.ucode   - Intel(R) Dual Band Wireless N/AC 8260
                              Intel(R) Dual Band Wireless AC 4165
    iwlwifi-8265-*.ucode    - Intel(R) Dual Band Wireless AC 8265
                              Intel(R) Dual Band Wireless AC 8275
    
    cfg/9000
    iwlwifi-9000-*.ucode    - Killer(R) Wireless-AC 1550s/1550i Wireless Network Adapter (9560NGW)
                              Killer(R) Wireless-AC 1550s Wireless Network Adapter (9560D2W) 160MHz
                              Killer(R) Wireless-AC 1550i Wireless Network Adapter (9560NGW) 160MHz
                              Intel(R) Wireless-AC 9461/9462/9560 160MHz
                              Intel(R) Wireless-AC 9461/9462/9560
    iwlwifi-9260-*.ucode    - Killer (R) Wireless-AC 1550 Wireless Network Adapter (9260NGW) 160MHz
                              Intel(R) Wireless-AC 9162/9260/9260-1/9270/9461/9462
                              Intel(R) Wireless-AC 9162/9260/9270/9461/9462 160MHz
    
    For cfg/22000 the list looks long and I will not describe everything
    here, but should be the remaining list which was covered by
    iwlax2xx-firmware.
    
    Thus, we can follow the same logic here and group all firmware under
    the new iwlwifi-mvm-firmware:
    
    * we fix the iwl7260-firmware case where it's not only about 7260
      devices, and avoid having to use Recommends between it and
      iwlax2xx-firmware which in practice means it's already
      advised keeping both installed together.
    * don't need to keep a small/alone iwl3160-firmware.
    * avoid having a device name in the package which can turn misleading
      as well, eg. we already have devices with name ax4xx like
      "Intel(R) Wi-Fi 6E AX411 160MHz"
    
    v2: Add provides to the obsoleted packages as suggested by Josh Boyer
    
    Signed-off-by: Herton R. Krzesinski <herton@redhat.com>