meta-phosphor: prep for new override syntax

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I588025b614416c43aa2d053765ab53bacf890cb5
diff --git a/meta-phosphor/classes/obmc-phosphor-kernel-version.bbclass b/meta-phosphor/classes/obmc-phosphor-kernel-version.bbclass
index 8fa8947..cc08dc3 100644
--- a/meta-phosphor/classes/obmc-phosphor-kernel-version.bbclass
+++ b/meta-phosphor/classes/obmc-phosphor-kernel-version.bbclass
@@ -1,4 +1,4 @@
-do_kernel_configme_append() {
+do_kernel_configme:append() {
     # Remove previous CONFIG_LOCALVERSION
     sed -i '/CONFIG_LOCALVERSION/d' ${B}/.config