drivers: pwm: pwm_mcux: improve resolution by writing match register

Write PWM match registers directly instead of using the frequency and
duty cycle fields of the MCUX HAL driver. This allows the driver to take
full advantage of the resolution supported by the FlexPWM when setting
duty cycle and carrier frequency.

Fixes #59080

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>