target-arm: A64: Implement CRC instructions

Implement the optional A64 CRC instructions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1401458125-27977-6-git-send-email-peter.maydell@linaro.org
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index e872493..f2d5955 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -540,6 +540,7 @@
 #define GET_FEATURE(feat, hwcap) \
     do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
     GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP_A64_PMULL);
+    GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP_A64_CRC32);
 #undef GET_FEATURE
 
     return hwcaps;