Silicon/Qemu: Use the symbolic value for the SPCR table revision.

The current SPCR table revision is 2. Instead of using a hard-coded
value, use the symbolic constant
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_REVISION.

Signed-off-by: Rebecca Cran <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>

Author: Rebecca Cran

Silicon/Qemu/SbsaQemu/AcpiTables/Spcr.aslc

@@ -17,7 +17,8 @@ STATIC EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE Spcr = {
   SBSAQEMU_ACPI_HEADER (
     EFI_ACPI_6_0_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_SIGNATURE,
     EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE,
-    2), /* New MS definition for PL011 support */
+    /* New MS definition for PL011 support */
+    EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_REVISION),
   EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_INTERFACE_TYPE_ARM_PL011_UART,
   { EFI_ACPI_RESERVED_BYTE, EFI_ACPI_RESERVED_BYTE, EFI_ACPI_RESERVED_BYTE },
   {