xen/include: include <asm/types.h> in <xen/early_printk.h>

<asm/types.h> should be included because second argument of
early_puts has type 'size_t' which is defined in <asm/types.h>

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Acked-by: Julien Grall <jgrall@amazon.com>

xen/include/xen/early_printk.h

@@ -4,6 +4,8 @@
 #ifndef __XEN_EARLY_PRINTK_H__
 #define __XEN_EARLY_PRINTK_H__
 
+#include <asm/types.h>
+
 #ifdef CONFIG_EARLY_PRINTK
 void early_puts(const char *s, size_t nr);
 #else