arm64: configs: debugfs.config: Disable MSM_IDLE_STATS & PAGE_EXTENSION

When using defconfig fragments and including debugfs.config,
these options get enabled even though they shouldn't.
This matches stock defconfig extracted from /proc/config.gz.

Change-Id: I704617ee07b306bbf81bfd84ebd9ebcee0301abe
diff --git a/arch/arm64/configs/vendor/debugfs.config b/arch/arm64/configs/vendor/debugfs.config
index 059013b..9841b7c 100644
--- a/arch/arm64/configs/vendor/debugfs.config
+++ b/arch/arm64/configs/vendor/debugfs.config
@@ -1,2 +1,4 @@
+CONFIG_MSM_IDLE_STATS=n
+CONFIG_PAGE_EXTENSION=n
 CONFIG_PAGE_OWNER=n
 CONFIG_DEBUG_FS=n