qpnp-power-on-mmi: fix build error on user build

"kernel_halt" is not in Google's GKI whitelist, add modules.symvers of
QGKI to fix build error on GKI build.
This module is no must in GKI, it doesn't matter that fails to load

Change-Id: I77c89c1236bcd2352b85b69e180687744e1f59b4
Reviewed-on: https://gerrit.mot.com/1807425
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
Submit-Approved: Jira Key

drivers/input/misc/qpnp_power_on_mmi/Android.mk

@@ -5,5 +5,6 @@ include $(CLEAR_VARS)
 LOCAL_MODULE := qpnp-power-on-mmi.ko
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE_PATH := $(KERNEL_MODULES_OUT)
+KBUILD_OPTIONS_GKI += MODULE_KERNEL_VERSION=$(TARGET_KERNEL_VERSION)
 include $(DLKM_DIR)/AndroidKernelModule.mk
 

drivers/input/misc/qpnp_power_on_mmi/Kbuild

@@ -1,6 +1,7 @@
 # add -Wall to try to catch everything we can.
 EXTRA_CFLAGS += -Wall
 EXTRA_CFLAGS += -I$(TOP)/motorola/kernel/modules/include
+KBUILD_EXTRA_SYMBOLS += $(CURDIR)/../../kernel/msm-$(MODULE_KERNEL_VERSION)/Module.symvers
 
 obj-m += qpnp-power-on-mmi.o