CryptoPkg: Add EC support

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3828

This patch is used to add CryptEc library, which is wrapped
over OpenSSL.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Xiaoyu Lu <xiaoyu1.lu@intel.com>
Cc: Guomin Jiang <guomin.jiang@intel.com>

Signed-off-by: Yi Li <yi1.li@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf

@@ -59,6 +59,7 @@
   Pk/CryptTsNull.c
   Pk/CryptRsaPss.c
   Pk/CryptRsaPssSignNull.c
+  Pk/CryptEcNull.c
   Pem/CryptPemNull.c
   Rand/CryptRandNull.c
   Bn/CryptBnNull.c