target/arm: Enable ARM_V8_FP16 feature bit for the AArch64 "any" CPU

Now we have implemented FP16 we can enable it for the "any" CPU.
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
[PMM: split out from an earlier patch in the series]
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

target/arm/cpu64.c

@@ -230,6 +230,7 @@ static void aarch64_any_initfn(Object *obj)
     set_feature(&cpu->env, ARM_FEATURE_V8_SM4);
     set_feature(&cpu->env, ARM_FEATURE_V8_PMULL);
     set_feature(&cpu->env, ARM_FEATURE_CRC);
+    set_feature(&cpu->env, ARM_FEATURE_V8_FP16);
     cpu->ctr = 0x80038003; /* 32 byte I and D cacheline size, VIPT icache */
     cpu->dcz_blocksize = 7; /*  512 bytes */
 }