constify more dcache.h inlined helpers.

const struct pointers in commit f0d3b3ded9 ("constify dcache.c
inlined helpers where possible").
This patch allows 'const' in a couple that were added since then.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
NeilBrown 2017-10-20 11:41:17 +11:00 • committed by Al Viro
commit 4ded097bed