Revert "fix drivers/mmc/core/mmc.c and add changes in defconfig"

This reverts commit 5ce8c19f5d3889a28fce6feb3ec6b5aa78d6cc31.
Revert "fs: sync: Asynchronous Fsync from HTC"

This reverts commit 769b14689e2987de9f02d7a0a818581e65945ebe.