[PATCH] Enhanced SiS96x support

This is an update for the SiS IDE driver.

This is a 99% Vojtech work :
- Independant southbridge detection (no need to add current and future
  MuTIOL northbridge PCI ids knowledge to the driver),
- Lots of code cleanup,
- Debug code removed (unused for a while, I will maintain it in my tree
  if needed),

I changed some things:
- the new config_xfer_rate is commented out until ide_find_best_mode is
  patched for bad drive handling (until then I reverted to the old one
  using the config_drive_xfer_rate helper function).

include/linux/pci_ids.h

@@ -549,6 +549,7 @@
 #define PCI_DEVICE_ID_SI_601		0x0601
 #define PCI_DEVICE_ID_SI_620		0x0620
 #define PCI_DEVICE_ID_SI_630		0x0630
+#define PCI_DEVICE_ID_SI_633		0x0633
 #define PCI_DEVICE_ID_SI_635		0x0635
 #define PCI_DEVICE_ID_SI_640		0x0640
 #define PCI_DEVICE_ID_SI_645		0x0645
@@ -559,6 +560,7 @@
 #define PCI_DEVICE_ID_SI_652		0x0652
 #define PCI_DEVICE_ID_SI_655		0x0655
 #define PCI_DEVICE_ID_SI_730		0x0730
+#define PCI_DEVICE_ID_SI_733		0x0733
 #define PCI_DEVICE_ID_SI_630_VGA	0x6300
 #define PCI_DEVICE_ID_SI_730_VGA	0x7300
 #define PCI_DEVICE_ID_SI_735		0x0735
@@ -579,7 +581,10 @@
 #define PCI_DEVICE_ID_SI_5513		0x5513
 #define PCI_DEVICE_ID_SI_5518		0x5518
 #define PCI_DEVICE_ID_SI_5571		0x5571
+#define PCI_DEVICE_ID_SI_5581		0x5581
+#define PCI_DEVICE_ID_SI_5582		0x5582
 #define PCI_DEVICE_ID_SI_5591		0x5591
+#define PCI_DEVICE_ID_SI_5596		0x5596
 #define PCI_DEVICE_ID_SI_5597		0x5597
 #define PCI_DEVICE_ID_SI_5598		0x5598
 #define PCI_DEVICE_ID_SI_5600		0x5600