drivers/mrc_cache: move mrc_cache support to drivers

There's nothing intel-specific about the current mrc_cache support.
It's logic manages saving non-volatile areas into the boot media.
Therefore, expose it to the rest of the system for any and all to
use.

BUG=b:69614064

Change-Id: I3b331c82a102f88912a3e10507a70207fb20aecc
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/22901
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/soc/intel/broadwell/romstage/raminit.c b/src/soc/intel/broadwell/romstage/raminit.c
index 0470bee..665dad2 100644
--- a/src/soc/intel/broadwell/romstage/raminit.c
+++ b/src/soc/intel/broadwell/romstage/raminit.c
@@ -21,13 +21,13 @@
 #include <console/console.h>
 #include <device/pci_def.h>
 #include <lib.h>
+#include <mrc_cache.h>
 #include <string.h>
 #if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC)
 #include <ec/google/chromeec/ec.h>
 #include <ec/google/chromeec/ec_commands.h>
 #endif
 #include <vendorcode/google/chromeos/chromeos.h>
-#include <soc/intel/common/mrc_cache.h>
 #include <soc/iomap.h>
 #include <soc/pei_data.h>
 #include <soc/pei_wrapper.h>