net/ionic: do minor logging fixups

net/ionic: do minor logging fixups

Expose ionic_opcode_to_str() so it can be used for dev cmds, too.
Store the device name in struct adapter.

Switch to memcpy() to work around gcc false positives.

Signed-off-by: Andrew Boyer <aboyer@pensando.io>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>