pinctrl: sunxi: Add PN bank base pin

The A80 R-PIO controller has one more bank that what we've seen so far, add the
PN pin bank.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sunxi/pinctrl-sunxi.h

@@ -27,6 +27,7 @@
 #define PI_BASE	256
 #define PL_BASE	352
 #define PM_BASE	384
+#define PN_BASE	416
 
 #define SUNXI_PINCTRL_PIN(bank, pin)		\
 	PINCTRL_PIN(P ## bank ## _BASE + (pin), "P" #bank #pin)