net/mlx4_core: print firmware version during driver loading

net/mlx4_core: print firmware version during driver loading

When debugging firmware related issues, it's very helpful to have
firmware version info printed in the kernel log when the driver is
loaded. It's easier to match error/warning messages with different
FW versions in the log other than running a separate tool to get
the information during remote debugging.

Orabug: 28809377

Signed-off-by: Qing Huang <qing.huang@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
CC: Gerd Rausch <gerd.rausch@oracle.com>
CC: Aru Kolappan <aru.kolappan@oracle.com>
CC: Sujatha Srinivasa Gopalan <sujatha.tolstoy@oracle.com>
Signed-off-by: Brian Maly <brian.maly@oracle.com>