target/arm: Add ARM_FEATURE_SVE

Not enabled anywhere so far.
Signed-off-by: NRichard Henderson <richard.henderson@linaro.org>
Message-id: 20180119045438.28582-11-richard.henderson@linaro.org
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NAlex Bennée <alex.bennee@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

target/arm/cpu.h

@@ -1340,6 +1340,7 @@ enum arm_features {
     ARM_FEATURE_VBAR, /* has cp15 VBAR */
     ARM_FEATURE_M_SECURITY, /* M profile Security Extension */
     ARM_FEATURE_JAZELLE, /* has (trivial) Jazelle implementation */
+    ARM_FEATURE_SVE, /* has Scalable Vector Extension */
 };
 
 static inline int arm_feature(CPUARMState *env, int feature)