CryptoPkg: Need to enable crypto functions

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3992

V1: Enable CryptAes for PEI phase. Enable CryptHkdf for SMM phase.
    Update Readme.md

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Xiaoyu Lu <xiaoyux.lu@intel.com>
Cc: Guomin Jiang <guomin.jiang@intel.com>
Cc: Nishant C Mistry <nishant.c.mistry@intel.com>
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
Signed-off-by: Nishant C Mistry <nishant.c.mistry@intel.com>
Signed-off-by: Judah Vang <judah.vang@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf

@@ -44,7 +44,7 @@
   Hash/CryptParallelHash.c
   Hash/CryptDispatchApMm.c
   Hmac/CryptHmac.c
-  Kdf/CryptHkdfNull.c
+  Kdf/CryptHkdf.c
   Cipher/CryptAes.c
   Cipher/CryptAeadAesGcmNull.c
   Pk/CryptRsaBasic.c