OvmfPkg: sync FADT with QEMU: disable PM2 control block

Remove support for optional PM2 control block.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13612 6f19259b-4bc3-4df7-8a09-765794883524
MU SOURCE COMMIT:062c1cf74424e2c5606a43ea87dbce8ea8741433

Platforms/OvmfPkg/AcpiTables/Platform.h

@@ -37,13 +37,13 @@
 #define PM1b_EVT_BLK    0x00000000
 #define PM1a_CNT_BLK    0x0000b004
 #define PM1b_CNT_BLK    0x00000000
-#define PM2_CNT_BLK     0x00000022
+#define PM2_CNT_BLK     0x00000000
 #define PM_TMR_BLK      0x0000b008
 #define GPE0_BLK        0x0000afe0
 #define GPE1_BLK        0x00000000
 #define PM1_EVT_LEN     0x04
 #define PM1_CNT_LEN     0x02
-#define PM2_CNT_LEN     0x01
+#define PM2_CNT_LEN     0x00
 #define PM_TM_LEN       0x04
 #define GPE0_BLK_LEN    0x04
 #define GPE1_BLK_LEN    0x00