ti_usb_3410_5052: support alternate firmware

ti_usb_3410_5052: support alternate firmware

The TI USB serial driver supports specifying alternate vendor and
product IDs (since the chips can and are used in devices under other
vendor/product IDs).  However, the alternate IDs were not loaded in the
combined product table.  This patch also adds support for loading
alternate firmware for alternate vendor/product IDs.

Signed-off-by: Chris Adams <[email protected]>
Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>