Revert "i82371eb: Drop support for older PIIX chips"

This reverts commit 2b9004de602f98a404b17584ab3e1451f165c1f4.

Reason for revert: QEMU emulates that chipset and with that commit a Linux guest kernel can't find IDE devices anymore.

Change-Id: Iad75af4ea9993d6a2ec5433ad30d39900dab874e
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39238
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Keith Hui <buurin@gmail.com>
diff --git a/src/southbridge/intel/i82371eb/usb.c b/src/southbridge/intel/i82371eb/usb.c
index 38ab167..80b19a1 100644
--- a/src/southbridge/intel/i82371eb/usb.c
+++ b/src/southbridge/intel/i82371eb/usb.c
@@ -43,6 +43,15 @@
 	.ops_pci		= 0, /* No subsystem IDs on 82371EB! */
 };
 
+/* Note: No USB on 82371FB/MX (PIIX/MPIIX) and 82437MX. */
+
+/* Intel 82371SB (PIIX3) */
+static const struct pci_driver usb_driver_sb __pci_driver = {
+	.ops	= &usb_ops,
+	.vendor	= PCI_VENDOR_ID_INTEL,
+	.device	= PCI_DEVICE_ID_INTEL_82371SB_USB,
+};
+
 /* Intel 82371AB/EB/MB (PIIX4/PIIX4E/PIIX4M) */
 /* The 440MX (82443MX) consists of 82443BX + 82371EB (uses same PCI IDs). */
 static const struct pci_driver usb_driver_ab_eb_mb __pci_driver = {