fs: import f2fs from git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git (branch dev)

Up-to-date with
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git @26a7fca93f169a974685bb87c4b559d3d4372699
(f2fs: deactivate inode page if the inode is evicted)

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
f2fs: support 3.0

Initial patches by Now Computing, fixes for latest mainline f2fs by arter97

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>

Conflicts:

	.gitignore

Change-Id: I964f7afb05409344f6158774fe1c0ec8c99c70b1
shooter(u): defconfig: Enable F2FS

Conflicts:

	.gitignore

Change-Id: I7bc6f978fd98349e9c56d1fe338bd1294fac3f24