build: Only include modules needed by product

It takes long time to include all DLKM's makefile even if the
product does not need this module.

Change-Id: I8629ac29a3f7e115c04dc24d2508366314716dac
Signed-off-by: qianlong <qianl2@motorola.com>
Reviewed-on: https://gerrit.mot.com/2059989
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Zhenxin Xi <xizx@motorola.com>
Submit-Approved: Jira Key

AndroidKernelModule.mk

@@ -1,6 +1,8 @@
 ifeq ($(TARGET_BOARD_PLATFORM),taro)
+ifneq (,$(findstring $(LOCAL_MODULE),$(BOARD_VENDOR_KERNEL_MODULES)))
 #Taro is using a new mechanisim to build kernel modules
 include device/qcom/common/dlkm/Build_external_kernelmodule.mk
+endif
 else
 ifneq (,$(findstring gki,$(KERNEL_DEFCONFIG)))
 #GKI product should use Qcom latest dlkm compile file