arm64/sysreg: Update ID_AA64FPFR0_EL1 description to DDI0601 2025-12

The 2025 extensions add FEAT_F16MM and adjust some of the RES0 bits to be
RAZ instead as a placeholder for future extensions.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Author: broonie

arch/arm64/tools/sysreg

@@ -1654,7 +1654,13 @@ UnsignedEnum	26	F8MM4
 	0b0	NI
 	0b1	IMP
 EndEnum
-Res0	25:2
+Res0	25:16
+UnsignedEnum	15	F16MM2
+	0b0	NI
+	0b1	IMP
+EndEnum
+Res0	14:8
+Raz	7:2
 UnsignedEnum	1	F8E4M3
 	0b0	NI
 	0b1	IMP