part: header fix

Implementation made use of types defined in common.h, even though it
wasn't #included. It worked in circumstances when .c files included
every needed header (all).

Signed-off-by: Mateusz Zalega <m.zalega@samsung.com>
Cc: Tom Rini <trini@ti.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>

include/part.h

@@ -8,6 +8,7 @@
 #define _PART_H
 
 #include <ide.h>
+#include <common.h>
 
 typedef struct block_dev_desc {
 	int		if_type;	/* type of the interface */