meta-zaius: Use P9 features and enable VCS control

Set Zaius machine conf to use P9 features (pdbg host control and VCS
workaround).
Use Zaius vcs-control recipe for machine-specific VCS workaround
components (virtual/p9-vcs-workaround).

Signed-off-by: Xo Wang <xow@google.com>
Change-Id: Ib75779da074b47c4fa335c5d2dfc40dc1bb82f04
diff --git a/meta-openbmc-machines/meta-openpower/meta-ingrasys/meta-zaius/conf/machine/zaius.conf b/meta-openbmc-machines/meta-openpower/meta-ingrasys/meta-zaius/conf/machine/zaius.conf
index 4aca420..38713cd 100644
--- a/meta-openbmc-machines/meta-openpower/meta-ingrasys/meta-zaius/conf/machine/zaius.conf
+++ b/meta-openbmc-machines/meta-openpower/meta-ingrasys/meta-zaius/conf/machine/zaius.conf
@@ -5,6 +5,9 @@
 
 FLASH_SIZE = "65536"
 
+PREFERRED_PROVIDER_virtual/p9-vcs-workaround = 'vcs-control'
+
 require conf/machine/include/ast2500.inc
 require conf/machine/include/obmc-bsp-common.inc
 require conf/machine/include/ingrasys.inc
+require conf/machine/include/p9.inc