hwmon: (i5k_amb) Load automatically on all 5000/5400 chipsets

It turns out that we cannot create a pci_driver in this driver because PCI will
not call this module's probe function if the i5000-edac driver is already
loaded.  That said, we only want one value (AMBASE) from the PCI config space.
Neither driver alters this value, so it's safe to read it.  However, we still
want the module aliases, so provide that.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>