arm64/sysreg: Add defintion for ALLINT

The FEAT_NMI extension adds a new system register ALLINT for controlling
NMI related interrupt masking, add a definition of this register as per
DDI0487H.a.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-29-broonie@kernel.orgSigned-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/tools/sysreg

@@ -761,6 +761,12 @@ Sysreg	SMCR_EL1	3	0	1	2	6
 Fields	SMCR_ELx
 EndSysreg
 
+Sysreg	ALLINT	3	0	4	3	0
+Res0	63:14
+Field	13	ALLINT
+Res0	12:0
+EndSysreg
+
 Sysreg	FAR_EL1	3	0	6	0	0
 Field	63:0	ADDR
 EndSysreg