acpi: q35: drop _SB.PCI0.ISA.LPCD opregion.

Seems to be unused.

ich9 DSDT changes:

     Scope (_SB.PCI0)
     {
         Device (ISA)
         {
             Name (_ADR, 0x001F0000)  // _ADR: Address
             OperationRegion (PIRQ, PCI_Config, 0x60, 0x0C)
-            OperationRegion (LPCD, PCI_Config, 0x80, 0x02)
-            Field (LPCD, AnyAcc, NoLock, Preserve)
-            {
-                COMA,   3,
-                    ,   1,
-                COMB,   3,
-                Offset (0x01),
-                LPTD,   2
-            }
         }
     }
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Message-Id: <20200619091905.21676-12-kraxel@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/i386/acpi-build.c

@@ -1340,7 +1340,6 @@ static void build_q35_isa_bridge(Aml *table)
 {
     Aml *dev;
     Aml *scope;
-    Aml *field;
 
     scope =  aml_scope("_SB.PCI0");
     dev = aml_device("ISA");
@@ -1350,16 +1349,6 @@ static void build_q35_isa_bridge(Aml *table)
     aml_append(dev, aml_operation_region("PIRQ", AML_PCI_CONFIG,
                                          aml_int(0x60), 0x0C));
 
-    aml_append(dev, aml_operation_region("LPCD", AML_PCI_CONFIG,
-                                         aml_int(0x80), 0x02));
-    field = aml_field("LPCD", AML_ANY_ACC, AML_NOLOCK, AML_PRESERVE);
-    aml_append(field, aml_named_field("COMA", 3));
-    aml_append(field, aml_reserved_field(1));
-    aml_append(field, aml_named_field("COMB", 3));
-    aml_append(field, aml_reserved_field(1));
-    aml_append(field, aml_named_field("LPTD", 2));
-    aml_append(dev, field);
-
     aml_append(scope, dev);
     aml_append(table, scope);
 }