ANDROID: sync encrypt+casefold support with patches going upstream

The following patches are now queued in f2fs/dev for 5.11, but
android-mainline and android12-5.4 have an old version of them:

	libfs: Add generic function for setting dentry_ops
	fscrypt: Have filesystems handle their d_ops
	f2fs: Handle casefolding with Encryption

Get them up-to-date.

Link: https://lore.kernel.org/linux-f2fs-devel/20201119060904.463807-1-drosen@google.com


Bug: 161184936
Test: kvm-xfstests -c f2fs/default,f2fs/encrypt -g casefold
Change-Id: I359bf4f23631c1b8175de8d5f12d0787fd7f42bd
Signed-off-by: Eric Biggers <ebiggers@google.com>