scripts: fix wrong usage of '==' operator

[base-files] shell-scripting: fix wrong usage of '==' operator

normally the '==' is used for invoking a regex parser and is a bashism.
all of the fixes just want to compare a string. the used busybox-ash
will silently "ignore" this mistake, but make it portable/clean at least.

this patch does not change the behavior/logic of the scripts.

Signed-off-by: Bastian Bittorf <bittorf@bluebottle.com>

SVN-Revision: 42911

package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh

@@ -476,7 +476,7 @@ mac80211_setup_adhoc() {
 	json_get_vars bssid ssid key mcast_rate
 
 	keyspec=
-	[ "$auth_type" == "wep" ] && {
+	[ "$auth_type" = "wep" ] && {
 		set_default key 1
 		case "$key" in
 			[1234])