GPIO fixes for the v4.11 series: - Set the parent on the Altera A10SR driver, also fix high level IRQs. - Fix error path on the mockup driver. - Compilation noise about unused functions fixed. - Fix missed interrupts on the MCP23S08 expander, this is also tagged for stable. - Retire the interrim helpers devm_get_gpiod_from_child() used to smoothen merging in the merge window.