Bios emulator - fix microblaze toolchain problem

microblaze CPU have problem with bios_emulator code.
Microblaze toolchain doesn't support PRAGMA PACK.

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/drivers/bios_emulator/bios.c b/drivers/bios_emulator/bios.c
index 7aa1bfb2e..70e9ce1 100644
--- a/drivers/bios_emulator/bios.c
+++ b/drivers/bios_emulator/bios.c
@@ -41,9 +41,12 @@
 *
 ****************************************************************************/
 
-#include "biosemui.h"
+#include <common.h>
 
 #if defined(CONFIG_BIOSEMU)
+
+#include "biosemui.h"
+
 /*----------------------------- Implementation ----------------------------*/
 
 /****************************************************************************