FROMLIST: f2fs: add support for IV_INO_LBLK_64 encryption policies

f2fs inode numbers are stable across filesystem resizing, and f2fs inode
and file logical block numbers are always 32-bit.  So f2fs can always
support IV_INO_LBLK_64 encryption policies.  Wire up the needed
fscrypt_operations to declare support.

Signed-off-by: Eric Biggers <ebiggers@google.com>

Change-Id: Ifc5b6bf883d0a049dbccf6a06955f69a1dfc4617
Signed-off-by: Satya Tangirala <satyat@google.com>
Link: https://patchwork.kernel.org/patch/11210903/