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

Remove <common.h> from all "commmon/" files and when needed add
missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/common/xyzModem.c b/common/xyzModem.c
index fb319f7..9feb240 100644
--- a/common/xyzModem.c
+++ b/common/xyzModem.c
@@ -21,12 +21,13 @@
  *
  *==========================================================================
  */
-#include <common.h>
 #include <xyzModem.h>
 #include <stdarg.h>
+#include <time.h>
 #include <u-boot/crc.h>
 #include <watchdog.h>
 #include <env.h>
+#include <vsprintf.h>
 
 /* Assumption - run xyzModem protocol over the console port */