iSerialNumber -> serial

[Martin Pieuchot]

Simple change to have verbose USB device fit into 80 chars in usbdevs(8): 

Before
======

$ usbdevs -v
addr 04: 0b95:1790 ASIX Elec. Corp., AX88179                                   
         high speed, power 248 mA, config 1, rev 1.00, iSerialNumber 
0000133B8B1B30
         driver: axen0


After
======

$ usbdevs -v
addr 04: 0b95:1790 ASIX Elec. Corp., AX88179                                   
         high speed, power 248 mA, config 1, rev 1.00, serial 0000133B8B1B30   
         driver: axen0

ok?

Index: usbdevs.c
===================================================================
RCS file: /cvs/src/usr.sbin/usbdevs/usbdevs.c,v
retrieving revision 1.29
diff -u -p -r1.29 usbdevs.c
--- usbdevs.c   12 Jul 2018 07:58:23 -0000      1.29
+++ usbdevs.c   25 Dec 2018 22:30:15 -0000
@@ -119,7 +119,7 @@ usbdev(int f, uint8_t addr)
 
                printf("rev %s", di.udi_release);
                if (strlen(di.udi_serial))
-                       printf(", iSerialNumber %s", di.udi_serial);
+                       printf(", serial %s", di.udi_serial);
        }
        printf("\n");