move --oldconfig to config

etc/gentoo-upgrade.conf

@@ -1,6 +1,6 @@
 EGENCACHE=FALSE
 ECLEAN_DISTFILES=TRUE
-GENKERNEL_ARGS="--microcode=all"
+GENKERNEL_ARGS="--microcode=all --oldconfig"
 PYTHON_ESELECT=FALSE
 RW_REMOUNT='/boot'
 RO_REMOUNT='/boot'

sbin/kernel-rebuild.sh

@@ -34,7 +34,6 @@ while true ; do
     esac
 done
 
-GENKERNEL_ARGS="$GENKERNEL_ARGS --oldconfig"
 [ "$SILENT" != "true" ] && GENKERNEL_ARGS="$GENKERNEL_ARGS --menuconfig"
 [ "$MRPROPER" == "true" ] && GENKERNEL_ARGS="$GENKERNEL_ARGS --mrproper"
 which genkernel &>/dev/null || USE_GENKERNEL=false