wlan: Update wlan source directory path for sdm429w

Use BOARD_OPENSOURCE_DIR to get wlan source directory path
for sdm429w target.

Change-Id: I24a41941ceb2a384040313a6f58a90d625ace245
CRs-Fixed: 2846100
diff --git a/Android.mk b/Android.mk
index ed92484..b16d937 100644
--- a/Android.mk
+++ b/Android.mk
@@ -113,6 +113,7 @@
 ifeq ($(KBUILD_OPTIONS),)
 KBUILD_OPTIONS += WLAN_PROPRIETARY=$(WLAN_PROPRIETARY)
 KBUILD_OPTIONS += TARGET_SUPPORTS_WEARABLES=$(TARGET_SUPPORTS_WEARABLES)
+KBUILD_OPTIONS += BOARD_OPENSOURCE_DIR=$(BOARD_OPENSOURCE_DIR)
 KBUILD_OPTIONS += KERNEL_TO_BUILD_ROOT_OFFSET=$(KERNEL_TO_BUILD_ROOT_OFFSET)
 endif
 
diff --git a/Kbuild b/Kbuild
index 7414ebd..e186b91 100644
--- a/Kbuild
+++ b/Kbuild
@@ -110,7 +110,7 @@
 else
 ifneq ($(ANDROID_BUILD_TOP),)
 ifeq ($(TARGET_PRODUCT),sdm429w)
-    WLAN_BLD_DIR := $(ANDROID_BUILD_TOP)/device/qcom/sdm429w/common/opensource/wlan
+    WLAN_BLD_DIR := $(ANDROID_BUILD_TOP)/$(BOARD_OPENSOURCE_DIR)/wlan
 else
     WLAN_BLD_DIR := $(ANDROID_BUILD_TOP)/vendor/qcom/opensource/wlan
 endif #TARGET_PRODUCT