arm64/sysreg: Fix unbalanced closing block

This is a sysreg block so close it with one. This doesn't make a
difference to the output because the script only matches on the
beginning of the word to close blocks which is correct by coincidence
here.

Signed-off-by: James Clark <james.clark@linaro.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20250115162600.2153226-2-james.clark@linaro.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/tools/sysreg

@@ -2076,7 +2076,7 @@ EndEnum
 Res0	4:2
 Field	1	ExTRE
 Field	0	E0TRE
-EndSysregFields
+EndSysreg
 
 Sysreg	SMPRI_EL1	3	0	1	2	4
 Res0	63:4