Merge "LoongArch: add old BPI compatibility (Once again) #130"

This is a general PR, mainly adding compatibility support for ABI1.0 and ABI2.0,
and some fixes. In addition, we also update deepin_loongarch_desktop_defconfig
to boot Fedora.

Some links:
Fedora ISO: https://github.com/fedora-remix-loongarch/releases-info
Diff of ABI1.0 and ABI2.0: loongson/LoongArch-Documentation#74
Firmware: https://github.com/loongson/Firmware/tree/main

Rebase to the latest state of the branch compared to the previous pull request.
Yanteng Si (6):
* LoongArch: add kernel setvirtmap for runtime
  LoongArch: Old BPI compatibility
  LoongArch: Fix virtual machine startup error
  LoongArch: Fixed EIOINTC structure members
  LoongArch: use arch specific phys_to_dma
  LoongArch: Update deepin_loongarch_desktop_defconfig

Signed-off-by: Yanteng Si <[email protected]>
Signed-off-by: WangYuli <[email protected]>