verbs_match_ent device field uninitialised with new driver id matching

[Potnuri Bharat Teja <bharat@xxxxxxxxxxx>]

Hi Jason,
0c3cecfe04d (verbs: Use CHARDEV info from netlink to bind drivers)
With above commit, `device and vendor` fields of verbs_match_entry are left 
unintialised as match_driver_id succeeds always. This has broken user space 
cxgb4 iwarp as it uses `device` to get the chipversion. I am sending a patch 
to fix it in cxgb4 But I wanted to know if device and vendor fields being 0 
is as expected. 

(gdb) p *(const struct verbs_match_ent *)0x155553d7d0c0
$2 = {
  driver_data = 0x0,
    u = {
        modalias = 0x4 <Address 0x4 out of bounds>,
	    driver_id = 4 '\004'
	      },
	        vendor = 0,
		  device = 0,
		    kind = 3 '\003'
		    }

Thanks,
Bharat