Re: [RFC 1/7] pinctrl: sh-pfc: r8a7790: Implement voltage switching for SDHI

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> ... and use "pfc->windows->virt + IOCTRL6" here and in
> r8a7790_set_io_voltage(), cfr. r8a7778_pinmux_get_bias().

This would mean I need to do something like this for unlocking:

	iowrite32(~data, pfc->windows->virt); /* unlock reg */

I hope this is okay, too.

Note: The new fast SDXC card I got produces timeouts. I want to
investigate first before resending this series.

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