pinctrl: qcom: sa8775: Limit check for array index not correct

pinctrl: qcom: sa8775: Limit check for array index not correct

In sa8775p_get_pin_name the limit check for the index into
msm_special_pins_data allows for more elements than exist. Add code to
ensure the array index remains in bounds.

This issue was found by Smatch.

Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org>
Link: https://lore.kernel.org/r/20250807-pinctrl_qcom-v1-1-42fac6707fd5@linaro.org
Signed-off-by: Casey Connolly <casey.connolly@linaro.org>