Dinar, H8SCM, H8QGI: Add prototype of get_bus_conf()

On Dinar, H8SCM, and H8QGI, add <cpu/amd/amdfam15.h> as an
include to pick up the prototype definition of get_bus_conf().

Change-Id: Ie4887670ac52aa194745881362df19cd1d75773e
Signed-off-by: Bruce Griffith <Bruce.Griffith@se-eng.com>
Reviewed-on: http://review.coreboot.org/3542
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Zheng Bao <zheng.bao@amd.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/amd/dinar/irq_tables.c

@@ -23,8 +23,7 @@
 #include <string.h>
 #include <stdint.h>
 #include <arch/pirq_routing.h>
-
-
+#include <cpu/amd/amdfam15.h>
 
 static void write_pirq_info(struct irq_info *pirq_info, u8 bus, u8 devfn,
 		u8 link0, u16 bitmap0, u8 link1, u16 bitmap1,