arm64/sysreg: Add definition for FPMR

DDI0601 2023-09 defines a new sysrem register FPMR (Floating Point Mode
Register) which configures the new FP8 features. Add a definition of this
register.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Fuad Tabba <tabba@google.com>
Link: https://lore.kernel.org/r/20231209-b4-arm64-sysreg-additions-v1-12-45284e538474@kernel.orgSigned-off-by: Will Deacon <will@kernel.org>

arch/arm64/tools/sysreg

@@ -2139,6 +2139,29 @@ Field	1	ZA
 Field	0	SM
 EndSysreg
 
+Sysreg	FPMR	3	3	4	4	2
+Res0	63:38
+Field	37:32	LSCALE2
+Field	31:24	NSCALE
+Res0	23
+Field	22:16	LSCALE
+Field	15	OSC
+Field	14	OSM
+Res0	13:9
+UnsignedEnum	8:6	F8D
+	0b000	E5M2
+	0b001	E4M3
+EndEnum
+UnsignedEnum	5:3	F8S2
+	0b000	E5M2
+	0b001	E4M3
+EndEnum
+UnsignedEnum	2:0	F8S1
+	0b000	E5M2
+	0b001	E4M3
+EndEnum
+EndSysreg
+
 SysregFields	HFGxTR_EL2
 Field	63	nAMAIR2_EL1
 Field	62	nMAIR2_EL1