common: Move relocate_code() to init.h

This is an init function so move it out of the common header. Avoid using
the typedef so that we don't have to include the global_data header file.

Also tidy up the function style in comments while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/freescale/p1022ds/spl.c b/board/freescale/p1022ds/spl.c
index 8d2c138..81c5bf0 100644
--- a/board/freescale/p1022ds/spl.c
+++ b/board/freescale/p1022ds/spl.c
@@ -7,6 +7,7 @@
 #include <console.h>
 #include <env.h>
 #include <env_internal.h>
+#include <init.h>
 #include <ns16550.h>
 #include <malloc.h>
 #include <mmc.h>
diff --git a/board/freescale/p1022ds/spl_minimal.c b/board/freescale/p1022ds/spl_minimal.c
index 9ab4029..31de263 100644
--- a/board/freescale/p1022ds/spl_minimal.c
+++ b/board/freescale/p1022ds/spl_minimal.c
@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <init.h>
 #include <ns16550.h>
 #include <asm/io.h>
 #include <nand.h>