treewide: Convert CONFIG_HOSTNAME to a string option
CONFIG_HOSTNAME is defined as a "plain" preprocessor string, but every
use is couched by __stringify(...).
Hence, convert it to a proper string option.
Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/include/configs/M54418TWR.h b/include/configs/M54418TWR.h
index ba9ba00..c614193 100644
--- a/include/configs/M54418TWR.h
+++ b/include/configs/M54418TWR.h
@@ -85,7 +85,7 @@
#endif /* CONFIG_SYS_DISCOVER_PHY */
#endif
-#define CONFIG_HOSTNAME M54418TWR
+#define CONFIG_HOSTNAME "M54418TWR"
#if defined(CONFIG_CF_SBF)
/* ST Micro serial flash */