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/eeprom/eeprom_layout.c b/common/eeprom/eeprom_layout.c
index 5a9be1d..1a425c1 100644
--- a/common/eeprom/eeprom_layout.c
+++ b/common/eeprom/eeprom_layout.c
@@ -6,8 +6,8 @@
  *	    Igor Grinberg <grinberg@compulab.co.il>
  */
 
-#include <common.h>
 #include <linux/kernel.h>
+#include <linux/string.h>
 #include <eeprom_layout.h>
 #include <eeprom_field.h>