RU.EFI v5.00 build 0054

This version is a more stable one and tested in both X64 and IA32 systems.  However there could still have many bugs, please leave me comments here if you found one.

1. Fixed can't read all CPU MSRs in IA32
2. Fixed displaying PCI BARs messing up the screen.
3. Added back Open/Close config feature for SIO (not tested)
4. Fixed hanging while entering RU with some platforms.
5. Fixed displaying wrong size of HDD.
6. Added back UEFI variable access.
7. IMPORTANT fix: Fixed PCI write not working.

Get RU.EFI 5.00.0054 here