[PATCH] dm: Fix build error when OF_CONTROL is not set

[Dan Murphy]

With OF_CONTROL disabled the build fails for
include/dm/read.h:932:10: error: ‘ENOTSUPP’ undeclared (first use in this 
function)

Fixes: 134f3c366d78 ("dm: core: gracefully handle alias seq without of")
Signed-off-by: Dan Murphy <dmur...@ti.com>
---
 include/dm/read.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/dm/read.h b/include/dm/read.h
index f02ec9595413..b1a610854403 100644
--- a/include/dm/read.h
+++ b/include/dm/read.h
@@ -9,6 +9,8 @@
 #ifndef _DM_READ_H
 #define _DM_READ_H
 
+#include <linux/errno.h>
+
 #include <dm/fdtaddr.h>
 #include <dm/ofnode.h>
 #include <dm/uclass.h>
-- 
2.27.0