thermal/drivers/exynos: Remove an unnecessary field description

It seems that the field has been removed in one of the previous commits,
but the description has been forgotten.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Mateusz Majewski <m.majewski2@samsung.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20231201095625.301884-2-m.majewski2@samsung.com

drivers/thermal/samsung/exynos_tmu.c

@@ -160,7 +160,6 @@ enum soc_type {
  *	in the positive-TC generator block
  *	0 < reference_voltage <= 31
  * @regulator: pointer to the TMU regulator structure.
- * @reg_conf: pointer to structure to register with core thermal.
  * @tzd: pointer to thermal_zone_device structure
  * @ntrip: number of supported trip points.
  * @enabled: current status of TMU device