nb/i945/raminit.c: Use Makefile.inc instead of '#include rcven.c'

Change-Id: Ib86600b687c7002646ca82d5fa52121b6eafcd60
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/18087
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/northbridge/intel/i945/Makefile.inc

@@ -25,6 +25,7 @@ romstage-y += raminit.c
 romstage-y += early_init.c
 romstage-y += errata.c
 romstage-y += debug.c
+romstage-y += rcven.c
 
 smm-y += udelay.c
 

src/northbridge/intel/i945/raminit.c

@@ -22,7 +22,6 @@
 #include <pc80/mc146818rtc.h>
 #include <spd.h>
 #include <string.h>
-#include <arch/io.h>
 #include <halt.h>
 #include <lib.h>
 #include "raminit.h"
@@ -2743,8 +2742,6 @@ static void sdram_recover_receive_enable(void)
 	MCHBAR32(C1DRT1) = reg32;
 }
 
-#include "rcven.c"
-
 static void sdram_program_receive_enable(struct sys_info *sysinfo)
 {
 	MCHBAR32(REPC) |= (1 << 0);

src/northbridge/intel/i945/rcven.c

@@ -13,7 +13,10 @@
  * GNU General Public License for more details.
  */
 
+#include <console/console.h>
+#include <arch/io.h>
 #include "raminit.h"
+#include "i945.h"
 
 /**
  * sample the strobes signal