CryptoPkg/BaseCryptLib: Add MARCO to disable the deprecated MD5

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1682

MD5 is deprecated but it is required for compatible issue.
So add a MARCO for the platform to disable the usage of MD5 for
security.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Xiaoyu Lu <xiaoyux.lu@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Siyuan Fu <siyuan.fu@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>

CryptoPkg/Include/Library/BaseCryptLib.h

@@ -72,6 +72,7 @@ typedef enum {
 //    One-Way Cryptographic Hash Primitives
 //=====================================================================================
 
+#ifndef DISABLE_MD5_DEPRECATED_INTERFACES
 /**
   Retrieves the size, in bytes, of the context buffer required for MD5 hash operations.
 
@@ -211,6 +212,7 @@ Md5HashAll (
   IN   UINTN       DataSize,
   OUT  UINT8       *HashValue
   );
+#endif
 
 /**
   Retrieves the size, in bytes, of the context buffer required for SHA-1 hash operations.