pinctrl: Fix pinctrl_gpio_get_pinctrl_and_offset()

Linux kernel Documentation/devicetree/bindings/gpio/gpio.txt define the
format of the gpio-ranges prop as:

  The format is: <[pin controller phandle], [GPIO controller offset],
                  [pin controller offset], [number of pins]>;

  Example:

      gpio-ranges = <&foo 0 20 10>, <&bar 10 50 20>;

  This means:
  - pins 20..29 on pin controller "foo" is mapped to GPIO line 0..9 and
  - pins 50..69 on pin controller "bar" is mapped to GPIO line 10..29

For this example, a call to pinctrl_gpio_get_pinctrl_and_offset() using
offset 10 incorrectly return pin controller "foo" instead of "bar".

Fix this by using an exclusive range check.

Fixes: d0bb00ad ("pinctrl: fix pinctrl_gpio_get_pinctrl_and_offset for gpio-ranges array")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Quanyang Wang <quanyang.wang@windriver.com>