RISC-V: 'Zfa' extension is now ratified

Since this extension is ratified, it now has the version number 1.0.

Reference:
<riscv/riscv-isa-manual#1096>

bfd/ChangeLog:

	* elfxx-riscv.c (riscv_supported_std_z_ext): Update the version
	number of 'Zfa' extension.

bfd/elfxx-riscv.c

@@ -1260,7 +1260,7 @@ static struct riscv_supported_ext riscv_supported_std_z_ext[] =
   {"zihintpause",	ISA_SPEC_CLASS_DRAFT,		2, 0,  0 },
   {"zmmul",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zawrs",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
-  {"zfa",		ISA_SPEC_CLASS_DRAFT,		0, 1,  0 },
+  {"zfa",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zfh",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zfhmin",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zfinx",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },