acpica: Update the SPCR table to version 4

cherry pick 1eeff52124a45d5cd887ba5687bbad0116e4d211 from acpica:

SPCR: Update the SPCR table to version 4

The Microsoft Serial Port Console Redirection (SPCR) specification
revision 1.09 comprises additional fields [1]. The newly added fields
are:

• RISC-V SBI
• Precise Baud Rate
• NamespaceStringLength
• NamespaceStringOffset
• NamespaceString

Additionaly, this code will support up to SPCR revision 1.10, as it
includes only minor wording changes.

[1] https://learn.microsoft.com/en-us/windows-hardware/drivers/serports/serial-port-console-redirection-table

Signed-off-by: Sia Jee Heng <jeeheng.sia@starfivetech.com>