dt-bindings: pinctrl: sunxi: Allow pinctrl with more interrupt banks

Recently introduced Allwinner A100 pinctrl block has 7 interrupts.

This trig a warning when running dtb_checks:
sun50i-a100-allwinner-perf1.dt.yaml: pinctrl@300b000: interrupts: [...] is too long
	From schema: .../allwinner,sun4i-a10-pinctrl.yaml

Fix this by allowing up to 7 interrupts.
Signed-off-by: Clément Péron <peron.clem@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201005190939.21016-1-peron.clem@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/allwinner,sun4i-a10-pinctrl.yaml

@@ -61,7 +61,7 @@ properties:
 
   interrupts:
     minItems: 1
-    maxItems: 5
+    maxItems: 7
     description:
       One interrupt per external interrupt bank supported on the
       controller, sorted by bank number ascending order.