Move designs docs to code update folder

The eMMC storage and Redfish code update design documents have
been implemented. Move them to the code update folder to keep
the code update and flash related documents in one place.

Change-Id: I2c75a876d07ec9539b9d0435055a71a7378ef82d
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/designs/emmc-storage-design.md b/architecture/code-update/emmc-storage-design.md
similarity index 100%
rename from designs/emmc-storage-design.md
rename to architecture/code-update/emmc-storage-design.md
diff --git a/designs/firmware-update-over-redfish.md b/architecture/code-update/firmware-update-over-redfish.md
similarity index 100%
rename from designs/firmware-update-over-redfish.md
rename to architecture/code-update/firmware-update-over-redfish.md