pci-acpi: remove unused variable in __pci_osc_support_set
The 'retval' variable in __pci_osc_support_set() is no longer used. Remove this unused variable. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Acked-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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