kona: Add build options per WLAN chip

Unified driver build makes separate driver per chip. Each of the driver
needs unique chip selection as driver cannot support multiple chips in a
single build. Pass proper chip configuration as build option.

Change-Id: I4b136b460f4cff9f8d4dd14f21455bc98459532c
CRs-Fixed: 2724608

kona/wlan.mk

@@ -50,3 +50,11 @@ WLAN_CFG_OVERRIDE_qca6490 := CONFIG_CNSS_QCA6490=y
 
 # Use default_config for all chips. Used with TARGET_WLAN_CHIP.
 WLAN_CFG_USE_DEFAULT := true
+
+# Inject Kbuild options per chip
+#
+# Select proper chip configuration for building WLAN driver module. Currently
+# driver supports only one chip configuration per build.
+#
+WLAN_KBUILD_OPTIONS_qca6390 := CONFIG_CNSS_QCA6390=y
+WLAN_KBUILD_OPTIONS_qca6490 := CONFIG_CNSS_QCA6490=y