Implement Intel OSPKE instructions

Implement Intel OSPKE instructions

This patch implements Intel OSPKE instructions documented in Intel64
and IA-32 Architectures Software Developer’s Manual Volume 2, September
2015.

gas/testsuite/

	* gas/i386/i386.exp: Run ospke and x86-64-ospke.
	* gas/i386/ospke.d: New file.
	* gas/i386/ospke.s: Likewise.
	* gas/i386/x86-64-ospke.d: Likewise.

opcodes/

	* i386-dis.c (MOD_0F01_REG_5): New.
	(RM_0F01_REG_5): Likewise.
	(reg_table): Use MOD_0F01_REG_5.
	(mod_table): Add MOD_0F01_REG_5.
	(rm_table): Add RM_0F01_REG_5.
	* i386-gen.c (cpu_flag_init): Add CPU_OSPKE_FLAGS.
	(cpu_flags): Add CpuOSPKE.
	* i386-opc.h (CpuOSPKE): New.
	(i386_cpu_flags): Add cpuospke.
	* i386-opc.tbl: Add rdpkru and wrpkru instructions.
	* i386-init.h: Regenerated.
	* i386-tbl.h: Likewise.