include: export uuid.h

Move this header to include/u-boot/ so that it can be used by external
tools.

Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/disk/part_efi.c b/disk/part_efi.c
index b1a03bd..580821a 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -15,7 +15,7 @@
 #include <blk.h>
 #include <log.h>
 #include <part.h>
-#include <uuid.h>
+#include <u-boot/uuid.h>
 #include <asm/cache.h>
 #include <asm/global_data.h>
 #include <asm/unaligned.h>