Revert "pwm: Improve PWM_PIO_RP1 dependencies"

This reverts commit f85f350.

Author: pelwell

drivers/pwm/Kconfig

@@ -468,7 +468,6 @@ config PWM_PCA9685
 config PWM_PIO_RP1
 	tristate "RP1 PIO PWM support"
 	depends on FIRMWARE_RP1 || COMPILE_TEST
-	select RP1_PIO
 	help
 	  This is a PWM framework driver for Raspberry Pi 5, using the PIO
 	  hardware of RP1 to provide PWM functionality. Supports up to 4