bmc: move away from blobs namespace

The blobs namespace is really owned by phosphor-ipmi-blobs.  Move all
phosphor-ipmi-flash objects into ipmi_flash namespace.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I51b721ad4f3cdc4cc43846c942967ed2e5f16589
diff --git a/tools/interface.hpp b/tools/interface.hpp
index 4a72313..ae341ec 100644
--- a/tools/interface.hpp
+++ b/tools/interface.hpp
@@ -30,7 +30,8 @@
      *
      * @return the enum value corresponding to the supported type.
      */
-    virtual blobs::FirmwareBlobHandler::UpdateFlags supportedType() const = 0;
+    virtual ipmi_flash::FirmwareBlobHandler::UpdateFlags
+        supportedType() const = 0;
 };
 
 } // namespace host_tool