Use cache.diff_intraline.enabled to control intraline

Since we moved the intraline data into a different cache, it
makes sense to move the enable control flag to be under the
new cache's name.

Change-Id: I7dbea1824e3fc22e4ccfe652c38af609e53ffdae
Signed-off-by: Shawn O. Pearce <sop@google.com>
2 files changed