device/dram: Move SPD manufacturer names out of arch/x86

Move SPD manufacturer ID decoding to device/dram. Will be used by the
following patch outside of SMBIOS scope as well.

Change-Id: Iec175cd6ab1d20761da955785e4bc0e87ae02dbb
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50544
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/include/device/dram/spd.h

@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef DEVICE_DRAM_SPD_H
+#define DEVICE_DRAM_SPD_H
+
+#include <types.h>
+
+const char *spd_manufacturer_name(const uint16_t mod_id);
+
+#endif /* DEVICE_DRAM_SPD_H */