pinctrl: at91-pio4: handle suspend to ram
When suspending to RAM, the power to the core is cut and the register values are lost. Save and restore more registers than just IMR. Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
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