MdePkg: Define AARCH64_CPTR_RES1 and AARCH64_CPTR_DEFAULT

These constants give the set of RES1 bits in CPTR_EL2, as 1s, and the
default value to use for CPTR_EL2 in order to enable all known (or
harmless) features but no unknown ones that require EL2 knowledge. This
will be used by ArmPlatformPkg in the following commit, separated due to
being different packages, even though the combined change is tiny.

Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>

Author: jrtc27

MdePkg/Include/AArch64/AArch64.h

@@ -22,7 +22,9 @@
 #define CPACR_DEFAULT    CPACR_FPEN_FULL
 
 // Coprocessor Trap Register (CPTR)
-#define AARCH64_CPTR_TFP  (1 << 10)
+#define AARCH64_CPTR_TFP      (1 << 10)
+#define AARCH64_CPTR_RES1     0x33ff
+#define AARCH64_CPTR_DEFAULT  AARCH64_CPTR_RES1
 
 // ID_AA64MMFR1 - AArch64 Memory Model Feature Register 0 definitions
 #define AARCH64_MMFR1_VH  (0xF << 8)