of: add stub of_get_child_by_name for non-OF builds

Fixes build error on s3c6400_defconfig, introduced by commit
06455bbcab76e5f5225de5f38ab948d37a1c3587, "dt/s3c64xx/spi: Use
of_get_child_by_name to get a named child".

drivers/spi/spi-s3c64xx.c: In function 's3c64xx_get_slave_ctrldata':
drivers/spi/spi-s3c64xx.c:838:2: error: implicit declaration of function
    'of_get_child_by_name' [-Werror=implicit-function-declaration]

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/of.h b/include/linux/of.h
index 72843b72a2b2..b4e50d56fc74 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -331,6 +331,13 @@ static inline bool of_have_populated_dt(void)
 #define for_each_child_of_node(parent, child) \
         while (0)
 
+static inline struct device_node *of_get_child_by_name(
+                                        const struct device_node *node,
+                                        const char *name)
+{
+        return NULL;
+}
+
 static inline int of_get_child_count(const struct device_node *np)
 {
         return 0;