common: Move main_loop() to init.h

Move this function out of common.h and into a better place.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>

common/main.c

@@ -12,6 +12,7 @@
 #include <command.h>
 #include <console.h>
 #include <env.h>
+#include <init.h>
 #include <version.h>
 
 /*