nb/intel/x4x: Place raminit definitions in raminit.h

There's no need to have implementation details in a public header.

Tested with BUILD_TIMELESS=1, Asus P5QL PRO remains identical.

Change-Id: I04d8c610d3e52adecfe96cc435f0523bedf3060a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45424
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
diff --git a/src/northbridge/intel/x4x/rcven.c b/src/northbridge/intel/x4x/rcven.c
index 82481ab..8a86ce9 100644
--- a/src/northbridge/intel/x4x/rcven.c
+++ b/src/northbridge/intel/x4x/rcven.c
@@ -3,6 +3,7 @@
 #include <device/mmio.h>
 #include <console/console.h>
 #include <delay.h>
+#include "raminit.h"
 #include "x4x.h"
 
 #define MAX_COARSE 15