Suppress incorrect objtool warnings

Suppress incorrect warnings from versions of objtool which are not
aware of x86 EVEX prefix instructions used for AVX512.

  module/zfs/vdev_raidz_math_avx512bw.o: warning:
  objtool: <func+offset>: can't find jump dest instruction at .text

Reviewed-by: Don Brady <don.brady@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #6928

include/sys/Makefile.am

@@ -35,6 +35,7 @@ COMMON_H = \
 	$(top_srcdir)/include/sys/dsl_userhold.h \
 	$(top_srcdir)/include/sys/edonr.h \
 	$(top_srcdir)/include/sys/efi_partition.h \
+	$(top_srcdir)/include/sys/frame.h \
 	$(top_srcdir)/include/sys/hkdf.h \
 	$(top_srcdir)/include/sys/metaslab.h \
 	$(top_srcdir)/include/sys/metaslab_impl.h \

include/sys/frame.h

@@ -0,0 +1,36 @@
+/*
+ * CDDL HEADER START
+ *
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (C) 2017 by Lawrence Livermore National Security, LLC.
+ */
+
+#ifndef _SYS_FRAME_H
+#define	_SYS_FRAME_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#if defined(__KERNEL__) && defined(HAVE_STACK_FRAME_NON_STANDARD)
+#include <linux/frame.h>
+#else
+#define	STACK_FRAME_NON_STANDARD(func)
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FRAME_H */