CORE-13332. PcMemGetBiosMemoryMap(): Update ACPI (Extended Attributes) support. ...

CORE-13332. PcMemGetBiosMemoryMap(): Update ACPI (Extended Attributes) support. (#143)

[FREELDR] Update ACPI (Extended Attributes) support in PcMemGetBiosMemoryMap()
CORE-13332

* PcMemGetBiosMemoryMap(): Add Extended Attributes set and check for entry validity and default handling of unexpected case.

* pcbios.h: Rename superceded BIOS_MEMORY_MAP.Reserved. Adapt existing code to new ACPI 6.2-A definitions.

* pcbios.h: Update BIOS_MEMORY_TYPE and BIOS_MEMORY_MAP to ACPI 6.2-A from 1.0+.

* PcMemGetBiosMemoryMap(): Misc fixes, no functional changes.
*Create PcMemCheckUsableMemorySize(), to split unrelated code out.
*Fix a copypasta in 2 output strings from ba9a1c3abba3b795a55186f289704ec8eeaf1cb9.
*Improve output readability of TRACE("ECX ...", ...).
*Move a TRACE("\n").
*Improve code style a bit.