qcacld-3.0: Add an option to pass build options

Top layer makefile can pass chip specific build options incase of
unified driver build.

Change-Id: I76a9830e56cfefdb3c99ac05fe43071cf5ebccab
CRs-Fixed: 2724605

Android.mk

@@ -130,6 +130,15 @@ ifneq ($(WLAN_CFG_OVERRIDE_$(LOCAL_DEV_NAME)),)
 KBUILD_OPTIONS += WLAN_CFG_OVERRIDE="$(WLAN_CFG_OVERRIDE_$(LOCAL_DEV_NAME))"
 endif
 
+# Pass build options per chip to Kbuild. This will be injected from upper layer
+# makefile.
+#
+# e.g.
+#  WLAN_KBUILD_OPTIONS_qca6390 := CONFIG_CNSS_QCA6390=y
+ifneq ($(WLAN_KBUILD_OPTIONS_$(LOCAL_DEV_NAME)),)
+KBUILD_OPTIONS += "$(WLAN_KBUILD_OPTIONS_$(LOCAL_DEV_NAME))"
+endif
+
 include $(CLEAR_VARS)
 LOCAL_MODULE              := $(WLAN_CHIPSET)_$(LOCAL_DEV_NAME).ko
 LOCAL_MODULE_KBUILD_NAME  := $(LOCAL_MOD_NAME).ko