Add AMD znver5 processor support

gas/

	* config/tc-i386.c (cpu_arch): Add znver5 ARCH.
	* doc/c-i386.texi: Add znver5.
	* testsuite/gas/i386/arch-15.d: New.
	* testsuite/gas/i386/arch-15.s: Likewise.
	* testsuite/gas/i386/arch-15-znver5.d: Likewise.
	* testsuite/gas/i386/i386.exp: Add new znver5 test cases.
	* testsuite/gas/i386/x86-64.exp: Likewise.
	* testsuite/gas/i386/x86-64-arch-5.d: Likewise.
	* testsuite/gas/i386/x86-64-arch-5.s: Likewise.
	* testsuite/gas/i386/x86-64-arch-5-znver5.d: Likewise.

opcodes/

	* i386-gen.c (isa_dependencies): Add ZNVER5 dependencies.
	* i386-init.h: Re-generated.