Add device and platform code for ix7-bwde, ix8a-bwde.
Support platform API 2.0 for all quanta platforms except for ix1b
Co-authored-by: robert.hong <robert.hong@qct.io>
1. undefine led_classdev_register as it is defined in leds.h
2. header file location change
a. linux/i2c/pmbus.h -> linux/pmbus.h
b. linux/i2c-mux-gpio.h -> linux/platform_data/i2c-mux-gpio.h
c. linux/i2c/pca954x.h -> linux/platform_data/pca954x.h