dm9601: add support for dm9621a based dongle

dm9621a is functionally identical to dm9620, so the existing handling can
directly be used.

Thanks to Davicom for sending me a dongle.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed