iwlwifi: split POWER_PMI status bit

Move the POWER_PMI to the op_mode where it is changed.  The trans needs
to check it frequently, so shadow the status in the trans and update it
in trans when it infrequently changes.

Signed-off-by: Don Fry <donald.h.fry@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index 56becf2..dcf5b12 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -850,7 +850,7 @@
 	 * In power save mode while associated use one chain,
 	 * otherwise use all chains
 	 */
-	if (test_bit(STATUS_POWER_PMI, &priv->shrd->status) &&
+	if (test_bit(STATUS_POWER_PMI, &priv->status) &&
 	    !(priv->hw->conf.flags & IEEE80211_CONF_IDLE)) {
 		/* rx_ant has been set to all valid chains previously */
 		active_chains = rx_ant &