hv:move several files related X86 for lib

modified:   Makefile
renamed:    lib/memory.c -> arch/x86/lib/memory.c
renamed:    include/lib/atomic.h -> include/arch/x86/lib/atomic.h
renamed:    include/lib/bits.h -> include/arch/x86/lib/bits.h
renamed:    include/lib/spinlock.h -> include/arch/x86/lib/spinlock.h

Tracked-On: #1842
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>

hypervisor/arch/x86/lib/memory.c

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2018 Intel Corporation.
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <types.h>
+
+static inline void memcpy_erms(void *d, const void *s, size_t slen)
+{
+	asm volatile ("rep; movsb"
+		: "=&D"(d), "=&S"(s)
+		: "c"(slen), "0" (d), "1" (s)
+		: "memory");
+}
+
+/*
+ * @brief  Copies at most slen bytes from src address to dest address, up to dmax.
+ *
+ *   INPUTS
+ *
+ * @param[in] d        pointer to Destination address
+ * @param[in] dmax     maximum  length of dest
+ * @param[in] s        pointer to Source address
+ * @param[in] slen     maximum number of bytes of src to copy
+ *
+ * @return pointer to destination address.
+ *
+ * @pre d and s will not overlap.
+ */
+void *memcpy_s(void *d, size_t dmax, const void *s, size_t slen)
+{
+	if ((slen != 0U) && (dmax != 0U) && (dmax >= slen)) {
+		/* same memory block, no need to copy */
+		if (d != s) {
+			memcpy_erms(d, s, slen);
+		}
+	}
+	return d;
+}
+
+static inline void memset_erms(void *base, uint8_t v, size_t n)
+{
+	asm volatile("rep ; stosb"
+			: "+D"(base)
+			: "a" (v), "c"(n));
+}
+
+void *memset(void *base, uint8_t v, size_t n)
+{
+	/*
+	 * Some CPUs support enhanced REP MOVSB/STOSB feature. It is recommended
+	 * to use it when possible.
+	 */
+	if ((base != NULL) && (n != 0U)) {
+		memset_erms(base, v, n);
+        }
+
+	return base;
+}