Add Realtek Android SDK.

wlan/Android.mk

@@ -0,0 +1,3 @@
+ifeq ($(BOARD_WIFI_VENDOR), realtek)
+	include $(call all-subdir-makefiles)
+endif

wlan/config/Android.mk

@@ -0,0 +1,41 @@
+#
+# Copyright (C) 2008 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+LOCAL_PATH := $(call my-dir)
+
+########################
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := dhcpcd.conf
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)/dhcpcd
+LOCAL_SRC_FILES := android_dhcpcd.conf
+include $(BUILD_PREBUILT)
+
+########################
+
+WIFI_DRIVER_SOCKET_IFACE := wlan0
+ifeq ($(strip $(WPA_SUPPLICANT_VERSION)),VER_0_8_X)
+  include external/wpa_supplicant_8/wpa_supplicant/wpa_supplicant_conf.mk
+else
+ifeq ($(strip $(WPA_SUPPLICANT_VERSION)),VER_0_6_X)
+  include external/wpa_supplicant_6/wpa_supplicant/wpa_supplicant_conf.mk
+else
+  include external/wpa_supplicant/wpa_supplicant_conf.mk
+endif
+endif
+
+########################

wlan/config/android_dhcpcd.conf

@@ -0,0 +1,6 @@
+# dhcpcd configuration for Android Wi-Fi interface
+# See dhcpcd.conf(5) for details.
+
+interface wlan0
+# dhcpcd-run-hooks uses these options.
+option subnet_mask, routers, domain_name_servers