pwm: stm32: Emit debug output also for corner cases of the rounding callbacks

pwm: stm32: Emit debug output also for corner cases of the rounding callbacks

When you're interested in the actual register settings the driver
chooses or interprets you want to see them also for calls that hit
corner cases.

Make sure that all calls to stm32_pwm_round_waveform_tohw() and
stm32_pwm_round_waveform_fromhw() emit the debug message about the
register settings.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/fe154e79319da5ff4159cdc71201a9d3b395e491.1743844730.git.u.kleine-koenig@baylibre.com
[ukleinek: widen scope of rate in stm32_pwm_round_waveform_fromhw() to fix FTBFS]
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>