pinctl: doc: Fix spelling mistake "resisitors" -> "resistors"

There is a spelling mistake in the documentation. Fix it.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220202091551.580372-1-colin.i.king@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/brcm,bcm11351-pinctrl.txt

@@ -85,7 +85,7 @@ Optional Properties (for I2C pins):
 - function:			String. Specifies the pin mux selection. Values
 				must be one of: "alt1", "alt2", "alt3", "alt4"
 - bias-pull-up:			Integer. Pull up strength in Ohm. There are 3
-				pull-up resisitors (1.2k, 1.8k, 2.7k) available
+				pull-up resistors (1.2k, 1.8k, 2.7k) available
 				in parallel for I2C pins, so the valid values
 				are: 568, 720, 831, 1080, 1200, 1800, 2700 Ohm.
 - bias-disable:			No arguments. Disable pin bias.