Revert "[wpa_supplicant] cumilative patch from commit 3a5d1a7e6"

Revert submission 26533062-Supplicant_merge_June24

Reason for revert: https://b.corp.google.com/issues/349780869

Reverted changes: /q/submissionid:26533062-Supplicant_merge_June24

Change-Id: I4a7a5b8ccb6b4822353bacc29649587cd5a3cb80
diff --git a/src/drivers/linux_ioctl.c b/src/drivers/linux_ioctl.c
index 29abc0c..7edb9df 100644
--- a/src/drivers/linux_ioctl.c
+++ b/src/drivers/linux_ioctl.c
@@ -161,20 +161,11 @@
 	ifr.ifr_ifindex = ifindex;
 	if (ioctl(sock, SIOCBRADDIF, &ifr) < 0) {
 		int saved_errno = errno;
-		char in_br[IFNAMSIZ];
 
 		wpa_printf(MSG_DEBUG, "Could not add interface %s into bridge "
 			   "%s: %s", ifname, brname, strerror(errno));
 		errno = saved_errno;
-
-		/* If ioctl() returns EBUSY when adding an interface into the
-		 * bridge, the interface might have already been added by an
-		 * external operation, so check whether the interface is
-		 * currently on the right bridge and ignore the error if it is.
-		 */
-		if (errno != EBUSY || linux_br_get(in_br, ifname) != 0 ||
-		    os_strcmp(in_br, brname) != 0)
-			return -1;
+		return -1;
 	}
 
 	return 0;