Add support for DC CVADP instruction.

DC CVADP is one of the data cache maintenance instruction(DC).
It clean data cache by virtual address to Point of Deep Persistence.

Change-Id: I5e9d62b8591ca3dc5053dfbebcd1ba24b9d5408f
diff --git a/src/cpu-features.h b/src/cpu-features.h
index fffef44..25c49d7 100644
--- a/src/cpu-features.h
+++ b/src/cpu-features.h
@@ -67,6 +67,8 @@
   V(kRAS,                 "RAS",                    NULL)                      \
   /* Data cache clean to the point of persistence: DC CVAP.                 */ \
   V(kDCPoP,               "DCPoP",                  "dcpop")                   \
+  /* Data cache clean to the point of deep persistence: DC CVADP.           */ \
+  V(kDCCVADP,             "DCCVADP",                NULL)                      \
   /* Cryptographic support instructions.                                    */ \
   V(kSHA3,                "SHA3",                   "sha3")                    \
   V(kSHA512,              "SHA512",                 "sha512")                  \