ec/hp/kbc1126/acpi/battery.asl: Make \ISTR serialized

This resolves the IASL remark:

  dsdt.aml 2141: Method (\ISTR, 2, NotSerialized)
  Remark 2120 - ^ Control Method should be made Serialized (due to creation of named objects within)

Change-Id: I36e814acc0746cb011b595493d8254f3fb73baf5
Signed-off-by: Iru Cai <mytbk920423@gmail.com>
Reviewed-on: https://review.coreboot.org/21668
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
1 file changed