thermal/drivers/sun8i: Extend H6 calibration to support 4 sensors

The H616 SoC resembles the H6 thermal sensor controller, with a few
changes like four sensors.

Extend sun50i_h6_ths_calibrate() function to support calibration of
these sensors.

Co-developed-by: Martin Botka <martin.botka@somainline.org>
Signed-off-by: Martin Botka <martin.botka@somainline.org>
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Acked-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20240219153639.179814-5-andre.przywara@arm.com