CLEANUP: http/h1: rely on HA_UNALIGNED_LE instead of checking for CPU families

Now that we have flags indicating the CPU's capabilities, better use
them instead of missing some updates for new CPU families (ARMv8 was
missing there).
diff --git a/src/h1.c b/src/h1.c
index 63fbee8..7513773 100644
--- a/src/h1.c
+++ b/src/h1.c
@@ -386,9 +386,7 @@
 
 	case H1_MSG_RQURI:
 	http_msg_rquri:
-#if defined(__x86_64__) ||						\
-    defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) || \
-    defined(__ARM_ARCH_7A__)
+#ifdef HA_UNALIGNED_LE
 		/* speedup: skip bytes not between 0x21 and 0x7e inclusive */
 		while (ptr <= end - sizeof(int)) {
 			int x = *(int *)ptr - 0x21212121;
@@ -734,16 +732,14 @@
 		 * also remove the sign bit test so that bytes 0x8e..0x0d break the
 		 * loop, but we don't care since they're very rare in header values.
 		 */
-#if defined(__x86_64__)
+#ifdef HA_UNALIGNED_LE64
 		while (ptr <= end - sizeof(long)) {
 			if ((*(long *)ptr - 0x0e0e0e0e0e0e0e0eULL) & 0x8080808080808080ULL)
 				goto http_msg_hdr_val2;
 			ptr += sizeof(long);
 		}
 #endif
-#if defined(__x86_64__) || \
-    defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) || \
-    defined(__ARM_ARCH_7A__)
+#ifdef HA_UNALIGNED_LE
 		while (ptr <= end - sizeof(int)) {
 			if ((*(int*)ptr - 0x0e0e0e0e) & 0x80808080)
 				goto http_msg_hdr_val2;