xen/arch/x86/boot/head.S: Set CBnT support capability in MLE

Signed-off-by: Michał Żygowski <[email protected]>

Author: miczyg1

xen/arch/x86/boot/head.S

@@ -128,7 +128,7 @@ mle_header:
         .long   0x00000000  /* First valid page of MLE */
         .long   0x00000000  /* Offset within binary of first byte of MLE */
         .long   (_end - start)  /* Offset within binary of last byte + 1 of MLE */
-        .long   0x00000323  /* Bit vector of MLE-supported capabilities */
+        .long   0x00000723  /* Bit vector of MLE-supported capabilities */
         .long   0x00000000  /* Starting linear address of command line (unused) */
         .long   0x00000000  /* Ending linear address of command line (unused) */