Zaius: Rearrange vcs-on/refclock-fixup/avsbus-en

Move vcs-on@.service, op-refclock@.service, and
avsbus-enable@0.service to run as part of
obmc-power-chassis-on.target instead of obmc-chassis-start.target
so that after starting just obmc-chassis-start@0.target cronus
will be able to run.

Resolves openbmc/openbmc#1396

Change-Id: Ic00614abc3ea27167041614e63eed392b5b622f9
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/meta-ingrasys/meta-zaius/recipes-phosphor/chassis/refclock-fixup/op-refclock-fixup@.service b/meta-ingrasys/meta-zaius/recipes-phosphor/chassis/refclock-fixup/op-refclock-fixup@.service
index c579f77..c94772d 100644
--- a/meta-ingrasys/meta-zaius/recipes-phosphor/chassis/refclock-fixup/op-refclock-fixup@.service
+++ b/meta-ingrasys/meta-zaius/recipes-phosphor/chassis/refclock-fixup/op-refclock-fixup@.service
@@ -14,4 +14,4 @@
 ExecStart={sbindir}/fix_zaius_refclock.sh
 
 [Install]
-WantedBy=obmc-chassis-start@%i.target
+RequiredBy=obmc-power-chassis-on@%i.target