wl12xx: make WL1271_FLAG_IDLE flag per-vif

This flag should be set per-vif, rather than globally.

Rename the flag to indicate IN_USE (rather than IDLE), as
in the default configuration (i.e. flag is clear) the vif
should be idle.

Change all the bit operations (and elp conditions) appropriately.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index 92a0577..69f6937 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -2384,6 +2384,10 @@
 				  bool idle)
 {
 	int ret;
+	bool cur_idle = !test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags);
+
+	if (idle == cur_idle)
+		return 0;
 
 	if (idle) {
 		/* no need to croc if we weren't busy (e.g. during boot) */
@@ -2402,7 +2406,7 @@
 			ACX_KEEP_ALIVE_TPL_INVALID);
 		if (ret < 0)
 			goto out;
-		set_bit(WL1271_FLAG_IDLE, &wl->flags);
+		clear_bit(WLVIF_FLAG_IN_USE, &wlvif->flags);
 	} else {
 		/* The current firmware only supports sched_scan in idle */
 		if (wl->sched_scanning) {
@@ -2413,7 +2417,7 @@
 		ret = wl12xx_start_dev(wl, wlvif);
 		if (ret < 0)
 			goto out;
-		clear_bit(WL1271_FLAG_IDLE, &wl->flags);
+		set_bit(WLVIF_FLAG_IN_USE, &wlvif->flags);
 	}
 
 out: