wlan: Allow builds to work in releases beyond JB

The current prima Android.mk selects the DLKM directory by testing
whether or not this is a JELLY_BEAN build.  Unfortunately this logic
will not work on releases that follow JELLY_BEAN, therefore modify the
logic to test the PLATFORM_SDK_VERSION instead.

CRs-fixed: 548121
Change-Id: I4b936c37d7709238b204196e52070d75e567dd1f
diff --git a/Android.mk b/Android.mk
index 3ccf472..93b8143 100644
--- a/Android.mk
+++ b/Android.mk
@@ -36,7 +36,8 @@
     WLAN_BLD_DIR := vendor/qcom/opensource/wlan
 endif
 
-ifeq ($(call is-android-codename,JELLY_BEAN),true)
+# DLKM_DIR was moved for JELLY_BEAN (PLATFORM_SDK 16)
+ifeq ($(call is-platform-sdk-version-at-least,16),true)
        DLKM_DIR := $(TOP)/device/qcom/common/dlkm
 else
        DLKM_DIR := build/dlkm