meta-romulus: Update VRM control scripts

Romulus VDDR uses different regulator, so the scripts is updated:
1. Remove VDDR related settings in vrm-control.sh
2. Add vrm.sh to invoke vrm-control.sh to set VDN, and invoke i2cset to
set VDDR.

Change-Id: I8be757728833280392328eaf03b3a88b911a4fbd
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/meta-romulus/recipes-phosphor/chassis/vrm-control.bb b/meta-romulus/recipes-phosphor/chassis/vrm-control.bb
index b924aae..049fabe 100644
--- a/meta-romulus/recipes-phosphor/chassis/vrm-control.bb
+++ b/meta-romulus/recipes-phosphor/chassis/vrm-control.bb
@@ -8,10 +8,12 @@
 RDEPENDS_${PN} += "i2c-tools bash"
 
 S = "${WORKDIR}"
-SRC_URI += "file://vrm-control.sh"
+SRC_URI += "file://vrm-control.sh \
+            file://vrm.sh"
 
 do_install() {
         install -d ${D}${bindir}
+        install -m 0755 ${WORKDIR}/vrm.sh ${D}${bindir}/vrm.sh
         install -m 0755 ${WORKDIR}/vrm-control.sh ${D}${bindir}/vrm-control.sh
 }