common:console: add missing include

search_device is declared in iomux, but console only
had the definition. This prevents a warning.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
diff --git a/common/console.c b/common/console.c
index 5a2f411..4695386 100644
--- a/common/console.c
+++ b/common/console.c
@@ -7,6 +7,7 @@
 
 #include <common.h>
 #include <stdarg.h>
+#include <iomux.h>
 #include <malloc.h>
 #include <os.h>
 #include <serial.h>
@@ -621,7 +622,7 @@
 
 }
 #else
-inline void dbg(const char *fmt, ...)
+static inline void dbg(const char *fmt, ...)
 {
 }
 #endif