Set proper mount path for FRP partition

Issue: FP2P-245
Test: run gts -m GtsGmscoreHostTestCases -t
com.google.android.gts.devicepolicy.DeviceOwnerTest#testFactoryResetProtection
run gts -m GtsGmscoreHostTestCases -t
com.google.android.gts.persistentdata.PersistentDataHostTest#testTestWriteReadBlock
run gts -m GtsGmscoreHostTestCases -t
com.google.android.gts.persistentdata.PersistentDataHostTest#testTestOverwriteBlock

Change-Id: I41202436384fb22f7071155afbec795a83ec88c1
diff --git a/device.mk b/device.mk
index ad28a08..891c254 100644
--- a/device.mk
+++ b/device.mk
@@ -67,7 +67,7 @@
 $(warning Build defined as $(BUILD_ID) ($(BUILD_NUMBER)))
 
 
-PRODUCT_PROPERTY_OVERRIDES += ro.frp.pst=/dev/block/bootdevice/by-name/pad
+PRODUCT_PROPERTY_OVERRIDES += ro.frp.pst=/dev/block/platform/msm_sdcc.1/by-name/pad
 
 DEVICE_PACKAGE_OVERLAYS += device/fairphone/fp2-common/overlay