initramfs/config: move debootstrap include packages to variable

initramfs/config

@@ -16,6 +16,7 @@
 mp=/tmp/newroot
 default_debian_suite=buster
 default_debian_mirror="http://httpredir.debian.org/debian"
+include_packages="vim,openssh-server,ntpdate,cron,locales,udev,fake-hwclock,mtd-utils,ca-certificates,apt-transport-https,vlan,libnl-3-200,libnl-genl-3-200"
 
 set_host() {
     case `hostname` in
@@ -175,7 +176,7 @@ bootstrap() {
     fi
     PATH=/bin:/usr/bin:/sbin:/usr/sbin:$PATH
     export PATH
-    debootstrap --arch=mipsel --include=vim,openssh-server,ntpdate,cron,locales,udev,fake-hwclock,mtd-utils,ca-certificates,apt-transport-https,vlan,libnl-3-200,libnl-genl-3-200 "$debian_version" "$mp" "$debian_mirror" || exit 1
+    debootstrap --arch=mipsel --include="$include_packages" "$debian_version" "$mp" "$debian_mirror" || exit 1
     return 1
 }