meta-ibm: p10bmc:system1: fix power workaround

The variable used to override a portion of the phosphor-skeleton power
recipe changed name in the base recipe. Need to adapt our override in
meta-ibm layer to match.

Tested:
- Confirmed the org.openbmc.control.Power instance service was not
  present on system1

Change-Id: Icd48020cfd2c0a954b79b264b153e71fede9904a
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-ibm/recipes-phosphor/chassis/phosphor-skeleton-control-power_%.bbappend b/meta-ibm/recipes-phosphor/chassis/phosphor-skeleton-control-power_%.bbappend
index 5d71e1d..f1ba720 100644
--- a/meta-ibm/recipes-phosphor/chassis/phosphor-skeleton-control-power_%.bbappend
+++ b/meta-ibm/recipes-phosphor/chassis/phosphor-skeleton-control-power_%.bbappend
@@ -3,5 +3,5 @@
 # Remove, from the p10bmc image, the service file that starts the skeleton power
 # control application. That image will use the power control application
 # included in the phosphor-power repository.
-OBMC_CONTROL_POWER_FMT:p10bmc = ""
-OBMC_CONTROL_POWER_FMT:system1 = ""
+OBMC_CONTROL_FMT:p10bmc = ""
+OBMC_CONTROL_FMT:system1 = ""