input: misc: pwm-haptic: Remove platform data

All the information contained in the platform data structure should be
instead set in the platform code using a pwm_lookup table.
MIPS: JZ4770: GCW0: Drop redundant information about PWM polarity
Revert "backlight: pwm-backlight: Allow to specify PWM polarity in pdata"

This reverts commit 5a9ff42220636be143cfcda07ef511397dca115c.
PWM: jz4740: Use ioremap to map the registers
PWM: JZ4740: Let the pinctrl driver set up the GPIOs
PWM: jz4770: Implement set_polarity
PWM: jz4740: Add support for the jz4770
MIPS: JZ4770: GCW0: Use the jz4740-pwm driver
MIPS: JZ4770: GCW0: defconfig: Enable jz4740-pwm instead of jz4770-pwm
PWM: jz4770-pwm: Remove driver obsoleted by jz4740-pwm