[pci] Correct invalid base-class/sub-class/prog-if order in PCIR

PCI Configuration Space contains fields prog-if at the offset 0x09,
sub-class at the offset 0x0a and base-class at the offset 0x0b (it
respects little endian).  PCIR structure uses these fields in the same
order.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/x86/prefix/mromprefix.S

 	.word	0x0000			/* Device list pointer */
 	.word	mpciheader_len		/* PCI data structure length */
 	.byte	0x03			/* PCI data structure revision */
-	.byte	0x02, 0x00, 0x00	/* Class code */
+	.byte	0x00, 0x00, 0x02	/* Class code */
 mpciheader_image_length:
 	.word	0			/* Image length */
 	.word	0x0001			/* Revision level */

src/arch/x86/prefix/romprefix.S

 	.word	( pci_devlist - pciheader ) /* Device list pointer */
 	.word	pciheader_len		/* PCI data structure length */
 	.byte	0x03			/* PCI data structure revision */
-	.byte	0x02, 0x00, 0x00	/* Class code */
+	.byte	0x00, 0x00, 0x02	/* Class code */
 pciheader_image_length:
 	.word	0			/* Image length */
 	.word	0x0001			/* Revision level */

src/util/Option/ROM.pm

       device_list =>	{ offset => 0x08, length => 0x02, pack => "S" },
       struct_length =>	{ offset => 0x0a, length => 0x02, pack => "S" },
       struct_revision =>{ offset => 0x0c, length => 0x01, pack => "C" },
-      base_class => 	{ offset => 0x0d, length => 0x01, pack => "C" },
+      prog_intf => 	{ offset => 0x0d, length => 0x01, pack => "C" },
       sub_class => 	{ offset => 0x0e, length => 0x01, pack => "C" },
-      prog_intf => 	{ offset => 0x0f, length => 0x01, pack => "C" },
+      base_class => 	{ offset => 0x0f, length => 0x01, pack => "C" },
       image_length =>	{ offset => 0x10, length => 0x02, pack => "S" },
       revision =>	{ offset => 0x12, length => 0x02, pack => "S" },
       code_type => 	{ offset => 0x14, length => 0x01, pack => "C" },

src/util/efirom.c

 	headers->pci.VendorId = opts->vendor;
 	headers->pci.DeviceId = opts->device;
 	headers->pci.Length = sizeof ( headers->pci );
-	headers->pci.ClassCode[0] = PCI_CLASS_NETWORK;
+	headers->pci.ClassCode[2] = PCI_CLASS_NETWORK;
 	headers->pci.ImageLength = ( rom_size / 512 );
 	headers->pci.CodeType = 0x03; /* No constant in EFI headers? */
 	headers->pci.Indicator = 0x80; /* No constant in EFI headers? */