iwm(4): Use htole16 for policy field in iwm_time_event_cmd_v2 struct.

[Imre Vadasz]

Hi,
The policy field in struct iwm_time_event_cmd_v2 is just a 16bit integer,
so we should use htole16() when setting it, instead of htole32().

Index: sys/dev/pci/if_iwm.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_iwm.c,v
retrieving revision 1.99
diff -u -r1.99 if_iwm.c
--- sys/dev/pci/if_iwm.c        17 Aug 2016 09:39:38 -0000      1.99
+++ sys/dev/pci/if_iwm.c        31 Aug 2016 19:37:05 -0000
@@ -2379,7 +2379,7 @@
        time_cmd.duration = htole32(duration);
        time_cmd.repeat = 1;
        time_cmd.policy
-           = htole32(IWM_TE_V2_NOTIF_HOST_EVENT_START |
+           = htole16(IWM_TE_V2_NOTIF_HOST_EVENT_START |
                IWM_TE_V2_NOTIF_HOST_EVENT_END |
                IWM_T2_V2_START_IMMEDIATELY);