Package firmware-linux: Information

- split off qcom, mrvl, mellanox subpackages:
  these hold huge firmwares for rare SoCs (e.g. robotics, 100GE switches)
- minor spec cleanup (see also ALT#46206)

- upstream changes (GIT b9d971b9):
  + cxgb4: Update firmware to revision 1.27.5.0 (thx Rahul Lakkireddy)
  + add firmware for en8811h 2.5G ethernet phy (thx SkyLake.Huang)
  + s5p-mfc: Add MFC v12 Firmware (thx Aakarsh Jain)

- configuration changes:
  + Revert "copy-firmware.sh: do'nt require rdfind";
  + spec: make install-nodedup
- upstream changes (GIT 5aadb590):
  + rtl_bt: Update RTL8852A BT USB firmware to 0xDFC8_145F (thx Hilda Wu)
  + ice: update ice DDP wireless_edge package to 1.3.13.0 (thx Przemek Kitszel)
  + update firmware for mediatek bluetooth chip (MT7922) (thx Chris Lu)
  + update firmware for mediatek bluetooth chip (MT7921) (thx Chris Lu)
  + update firmware for MT7922 WiFi device (thx Deren Wu)
  + update firmware for MT7921 WiFi device (thx Deren Wu)
  + Makefile, copy-firmware: Use portable "command -v" to detect
    installed programs (thx Eli Schwartz)
  + amdgpu: update DMCUB firmware to 0.0.194.0 for DCN321 and DCN32 (thx Tom Chung)
  + powervr: add firmware for Imagination Technologies AXE-1-16M GPU (thx Frank Binns)
  + ice: update ice DDP comms package to 1.3.45.0 (thx Przemek Kitszel)
  + ice: update ice DDP package to 1.3.35.0 (thx Przemek Kitszel)
  + mediatek: Remove an unused packed library (thx Jason Chen)