meta-phosphor: ipmi-flash: add reboot-update config

Add reboot-update PACKAGECONFIG option.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I73a3cbff9a15b7d73bf8eb47c1517c8b71c61bc9
diff --git a/recipes-phosphor/ipmi/phosphor-ipmi-flash_git.bb b/recipes-phosphor/ipmi/phosphor-ipmi-flash_git.bb
index d1fc565..2acccbb 100644
--- a/recipes-phosphor/ipmi/phosphor-ipmi-flash_git.bb
+++ b/recipes-phosphor/ipmi/phosphor-ipmi-flash_git.bb
@@ -18,6 +18,8 @@
 
 PACKAGECONFIG ?= "cleanup-delete"
 PACKAGECONFIG[cleanup-delete] = "--enable-cleanup-delete, --disable-cleanup-delete"
+# If using static-layout, reboot-update is a good option to handle updating.
+PACKAGECONFIG[reboot-update] = "--enable-reboot-update, --disable-reboot-update"
 
 EXTRA_OECONF = "--disable-tests --disable-build-host-tool"