net: wireless: bcmdhd: Add RX wakeup statistics

Debug dump will print RX statistics like:
 unicast A mutlicast B broadcast C arp D
 multi4 E multi6 F icmp6 G multiother H
where
 A + B + C - total amount of Rx wake packets
 E + F + H == B (total multicast)
 D - is totally separate count
 G is included in F

Change-Id: I6fc82a2f8630edca8d2c73c35f74dcb694adbff9
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>