keystone doesn't have custom gpio.h that's why don't select
GPIO_EXTRA_HEADER which points to it.
Logic in arch/arm/include/asm/gpio.h is very clear
#ifdef CONFIG_GPIO_EXTRA_HEADER
#include <asm/arch/gpio.h>
#endif
#include <asm-generic/gpio.h>
Where it is visible that there is no gpio.h in platform headers:
$ ls arch/arm/mach-keystone/include/mach/
clock_defs.h clock-k2e.h clock-k2hk.h ddr3.h hardware-k2e.h
hardware-k2hk.h i2c_defs.h mon.h mux-k2g.h xhci-keystone.h
clock.h clock-k2g.h clock-k2l.h hardware.h hardware-k2g.h
hardware-k2l.h mmc_host_def.h msmc.h psc_defs.h
Signed-off-by: Michal Simek <michal.simek@amd.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
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