bus/pci: fix size of driver name buffer

bus/pci: fix size of driver name buffer

Variable dri_name is a pointer and it is incorrect to use its
size as the buffer size. Caller knows the buffer size and
it is safer to pass it explicitly.

Fixes: fe5f777b5383 ("bus/pci: replace strncpy by strlcpy")
Cc: stable@dpdk.org
Signed-off-by: Andy Green <andy@warmcat.com>
Reviewed-by: Andrew Rybchenko <arybchenko@solarflare.com>