kernel-doc: fix param matching for array params

Fix function actual parameter vs. kernel-doc description matching
so that a warning is not printed when it should not be:

Warning(include/linux/etherdevice.h:199): Excess function parameter 'addr' description in 'is_etherdev_addr'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>