dm: Fix build error when OF_CONTROL is not set

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

Fixes: 45224e8f2691 ("dm: core: gracefully handle alias seq without of")
Signed-off-by: Dan Murphy <dmurphy@ti.com>

diff --git a/include/dm/read.h b/include/dm/read.h
index f02ec95..b1a6108 100644 (file)
--- 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>