Driver core: Revert "Fix Firmware class name collision"

This reverts commit 109f0e93.

The original patch breaks BIOS updates on all Dell machines. The path to
the firmware file for the dell_rbu driver changes, which breaks all of
the userspace tools which rely on it.

Note that this patch re-introduces a problem with i2c name collision
that was previously fixed by this patch.
Signed-off-by: Michael E Brown <michael_e_brown@dell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/base/firmware_class.c

@@ -292,7 +292,8 @@ firmware_class_timeout(u_long data)
 
 static inline void fw_setup_device_id(struct device *f_dev, struct device *dev)
 {
-	snprintf(f_dev->bus_id, BUS_ID_SIZE, "firmware-%s", dev->bus_id);
+	/* XXX warning we should watch out for name collisions */
+	strlcpy(f_dev->bus_id, dev->bus_id, BUS_ID_SIZE);
 }
 
 static int fw_register_device(struct device **dev_p, const char *fw_name,