serial: Remove <common.h> and add needed includes

Remove <common.h> from this driver directory and when needed
add missing include files directly.

Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/serial/serial_omap.c b/drivers/serial/serial_omap.c
index 49ced8f..9467265 100644
--- a/drivers/serial/serial_omap.c
+++ b/drivers/serial/serial_omap.c
@@ -6,7 +6,7 @@
  *	Lokesh Vutla <lokeshvutla@ti.com>
  */
 
-#include <common.h>
+#include <config.h>
 #include <dm.h>
 #include <dt-structs.h>
 #include <log.h>