NFC: driver: Add a local flag to enable/disable compilation

Modified code to add a local flag to enable or disable
module compilation based on system-wide global flags
for different targets.

Change-Id: I52ee08ed82a0d40999cfbd0e8969d43801f29d95

Android.mk

@@ -11,4 +11,18 @@ LOCAL_MODULE      := nxp-nci.ko
 LOCAL_MODULE_PATH := $(KERNEL_MODULES_OUT)
 LOCAL_SRC_FILES   := $(wildcard $(LOCAL_PATH)/**/*) $(wildcard $(LOCAL_PATH)/*)
 
-include $(DLKM_DIR)/Build_external_kernelmodule.mk
+NFC_DLKM_ENABLED := false
+
+########## Check and set local DLKM flag based on system-wide global flags ##########
+ifeq ($(TARGET_KERNEL_DLKM_DISABLE), true)
+  ifeq ($(TARGET_KERNEL_DLKM_NFC_OVERRIDE), true)
+    NFC_DLKM_ENABLED := true
+  endif
+else
+  NFC_DLKM_ENABLED := true
+endif
+
+########## Build kernel module based on local DLKM flag status ##########
+ifeq ($(NFC_DLKM_ENABLED), true)
+  include $(DLKM_DIR)/Build_external_kernelmodule.mk
+endif