fs/qnx4: sanitize includes

fs-internal parts of qnx4_fs.h taken to fs/qnx4/qnx4.h, includes adjusted,
qnx4_fs.h doesn't need unifdef anymore.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 3f0eaa3..b3afd22 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -135,6 +135,7 @@
 header-y += ppdev.h
 header-y += prctl.h
 header-y += qnxtypes.h
+header-y += qnx4_fs.h
 header-y += radeonfb.h
 header-y += raw.h
 header-y += resource.h
@@ -308,7 +309,6 @@
 unifdef-y += ppp_defs.h
 unifdef-y += ppp-comp.h
 unifdef-y += ptrace.h
-unifdef-y += qnx4_fs.h
 unifdef-y += quota.h
 unifdef-y += random.h
 unifdef-y += irqnr.h