pinctrl: pinctrl-single: Fix pcs_request_gpio() when bits_per_mux != 0

			|| pin < frange->offset)

			continue;

		mux_bytes = pcs->width / BITS_PER_BYTE;

		data = pcs->read(pcs->base + pin * mux_bytes) & ~pcs->fmask;

		if (pcs->bits_per_mux) {

			int byte_num, offset, pin_shift;

			byte_num = (pcs->bits_per_pin * pin) / BITS_PER_BYTE;

			offset = (byte_num / mux_bytes) * mux_bytes;

			pin_shift = pin % (pcs->width / pcs->bits_per_pin) *

				    pcs->bits_per_pin;

			data = pcs->read(pcs->base + offset);

			data &= ~(pcs->fmask << pin_shift);

			data |= frange->gpiofunc << pin_shift;

			pcs->write(data, pcs->base + offset);

		} else {

			data = pcs->read(pcs->base + pin * mux_bytes);

			data &= ~pcs->fmask;

			data |= frange->gpiofunc;

			pcs->write(data, pcs->base + pin * mux_bytes);

		}

		break;

	}

	return 0;