arm64: Define ID_AA64MMFR1_EL1.HAFDBS advertising FEAT_HAFT

This definition is missing, and we are going to need it to sanitise
TCR2_ELx.

Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Oliver Upton <[email protected]>

Author: Marc Zyngier

arch/arm64/tools/sysreg

@@ -1688,6 +1688,7 @@ UnsignedEnum	3:0	HAFDBS
 	0b0000	NI
 	0b0001	AF
 	0b0010	DBM
+	0b0011	HAFT
 EndEnum
 EndSysreg