Vendor/product comparisons are too broad

Vendor/product comparisons are too broad

We have a POWER machine with a broken multipath setup. Analysis shows
that the RDAC driver is being used even though it shouldn't.

The vendor/product is:

IBM,IPR-0   65C61818

There is an entry for this device:

                /* IBM IPR */
                .vendor        = "IBM",
                .product       = "IPR.*",

Unfortunately it looks like a previous entry is matching against this
(since we do a regex match):

            /* IBM DS5000 */
                .vendor        = "IBM",
                .product       = "1818",

There are a number of IBM entries that have this issue. The following
patch ensures we match against the entire product ID.