x86: flatten hierarchy

It never made sense to have bootblock_* in init, but
pirq_routing.c in boot, and some ld scripts on the main
level while others live in subdirectories.

This patch flattens the directory hierarchy and makes
x86 more similar to the other architectures.

Change-Id: I4056038fe7813e4d3d3042c441e7ab6076a36384
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/10901
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/arch/x86/memcpy.c

@@ -0,0 +1,22 @@
+#include <string.h>
+
+void *memcpy(void *dest, const void *src, size_t n)
+{
+	unsigned long d0, d1, d2;
+
+	asm volatile(
+#ifdef __x86_64__
+		"rep ; movsd\n\t"
+		"mov %4,%%rcx\n\t"
+#else
+		"rep ; movsl\n\t"
+		"movl %4,%%ecx\n\t"
+#endif
+		"rep ; movsb\n\t"
+		: "=&c" (d0), "=&D" (d1), "=&S" (d2)
+		: "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src)
+		: "memory"
+	);
+
+	return dest;
+}