pinctrl: qcom: sm8250: Add egpio support

This mirrors the egpio support added to sc7280/sm8450/etc. This change
is necessary for GPIOs 146 - 179 (34 GPIOs) to be used as normal GPIOs.

Signed-off-by: Sean Parker <sean.parker@viasat.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>