net: driver: hamradio: Fix potential unterminated string

With W=1 the following error is reported:

In function ‘strncpy’,
inlined from ‘hdlcdrv_ioctl’ at drivers/net/hamradio/hdlcdrv.c:600:4:
./include/linux/string.h:297:30: warning: ‘__builtin_strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
297 | #define __underlying_strncpy __builtin_strncpy
| ^
./include/linux/string.h:307:9: note: in expansion of macro ‘__underlying_strncpy’
307 | return __underlying_strncpy(p, q, size);

Replace strncpy with strlcpy to guarantee the string is terminated.

Signed-off-by: Andrew Lunn <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/hamradio/hdlcdrv.c

···
 
 	case HDLCDRVCTL_DRIVERNAME:
 		if (s->ops && s->ops->drvname) {
-			strncpy(bi.data.drivername, s->ops->drvname, 
+			strlcpy(bi.data.drivername, s->ops->drvname,
 				sizeof(bi.data.drivername));
 			break;
 		}