Forward port bochs pci changes.

No need for vga io region override.
Don't need kvm to force pci interrupt line on acpi device to 9.
Set the PCI base address to 0xc0000000.
diff --git a/src/pciinit.c b/src/pciinit.c
index 78f4212..0d558a9 100644
--- a/src/pciinit.c
+++ b/src/pciinit.c
@@ -119,12 +119,6 @@
             pci_set_io_region_addr(bdf, 3, 0x374);
         }
         break;
-    case PCI_CLASS_DISPLAY_VGA:
-        if (vendor_id != 0x1234)
-            goto default_map;
-        /* VGA: map frame buffer to default Bochs VBE address */
-        pci_set_io_region_addr(bdf, 0, 0xE0000000);
-        break;
     case PCI_CLASS_SYSTEM_PIC:
         /* PIC */
         if (vendor_id == PCI_VENDOR_ID_IBM) {
@@ -183,9 +177,8 @@
         && device_id == PCI_DEVICE_ID_INTEL_82371AB_3) {
         /* PIIX4 Power Management device (for ACPI) */
 
-        if (CONFIG_KVM)
-            // acpi sci is hardwired to 9
-            pci_config_writeb(bdf, PCI_INTERRUPT_LINE, 9);
+        // acpi sci is hardwired to 9
+        pci_config_writeb(bdf, PCI_INTERRUPT_LINE, 9);
 
         pci_config_writel(bdf, 0x40, PORT_ACPI_PM_BASE | 1);
         pci_config_writeb(bdf, 0x80, 0x01); /* enable PM io space */
@@ -202,7 +195,7 @@
         return;
 
     pci_bios_io_addr = 0xc000;
-    pci_bios_mem_addr = 0xf0000000;
+    pci_bios_mem_addr = 0xc0000000;
     pci_bios_bigmem_addr = RamSize;
     if (pci_bios_bigmem_addr < 0x90000000)
         pci_bios_bigmem_addr = 0x90000000;