FreeBSD/src cf2ba45 (r351217)sys/arm/mv a37x0_gpio.c

arm64: a37x0_gpio: Use syscon instead of MMIO region

The fdt node for this driver is a simple-mfd and syscon compatible one
meaning that simplemfd will be the driver attached for it. The gpio driver
is attached to the 'gpio' subnode so use syscon_get_handle_default to
obtain the handle of the syscon from the parent device and use this
to read/write to the memory region.

MFC after:      1 week
DeltaFile
+10-19sys/arm/mv/a37x0_gpio.c
+10-191 files

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