kernel: describe bridge patch "always accept EAP"

It was initially added in r26015 by nbd.

SVN-Revision: 46824

target/linux/generic/patches-3.18/641-bridge_always_accept_eap.patch

@@ -1,3 +1,9 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Subject: [PATCH] bridge: always accept EAP
+
+Allow EAP frames to pass through bridges even in learning state. Fixes
+issues with WDS.
+---
 --- a/net/bridge/br_input.c
 +++ b/net/bridge/br_input.c
 @@ -84,7 +84,7 @@ int br_handle_frame_finish(struct sk_buf

target/linux/generic/patches-4.0/641-bridge_always_accept_eap.patch

@@ -1,3 +1,9 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Subject: [PATCH] bridge: always accept EAP
+
+Allow EAP frames to pass through bridges even in learning state. Fixes
+issues with WDS.
+---
 --- a/net/bridge/br_input.c
 +++ b/net/bridge/br_input.c
 @@ -140,7 +140,7 @@ int br_handle_frame_finish(struct sk_buf

target/linux/generic/patches-4.1/641-bridge_always_accept_eap.patch

@@ -1,3 +1,9 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Subject: [PATCH] bridge: always accept EAP
+
+Allow EAP frames to pass through bridges even in learning state. Fixes
+issues with WDS.
+---
 --- a/net/bridge/br_input.c
 +++ b/net/bridge/br_input.c
 @@ -146,7 +146,7 @@ int br_handle_frame_finish(struct sock *