tests: drivers: pwm: fix order of parameters
tests: drivers: pwm: fix order of parameters

Fix #32918 [Coverity CID :219528] "Arguments in wrong order
in tests/drivers/pwm/pwm_loopback/src/main.c"

Signed-off-by: Guðni Már Gilbert <a67b89b8b42b5e36ccc84f3061af0045ff2a5bff@gmail.com>

nashif/zephyr,Vudentz/zephyr,galak/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr,finikorg/zephyr,galak/zephyr,nashif/zephyr,galak/zephyr,nashif/zephyr,finikorg/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,nashif/zephyr,galak/zephyr,nashif/zephyr,Vudentz/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr