FreeBSD/src 9df5244 (r314066)sys/dev/iwm if_iwm.c if_iwmvar.h

[iwm] Sync IWM_MVM_ALIVE waiting and start_fw handling with iwlwifi.

* Use the notification wait API, like it's done in the Linux iwlwifi code,
  to wait for the IWM_MVM_ALIVE notification.

* This also should fix some firmware load interrupt issues, and errors
  in the nic lock using.

Tested:

* (adrian) Intel 7260, STA mode

Obtained from:  dragonflybsd.git a7697ea01c11fd493aec52260a02f31df680eb91
DeltaFile
+236-126sys/dev/iwm/if_iwm.c
+9-12sys/dev/iwm/if_iwmvar.h
+8-8sys/dev/iwm/if_iwmreg.h
+253-1463 files

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