add PWM driver, output checked with logic analyzer spi_xfer() bug fix for cs_pin and message looping uart pin_mode init moved to uart driver
* ch569w-evt : add spi master driver, SPI0 tested * Update bsp/wch/risc-v/ch569w-evt/board/Kconfig * Update bsp/wch/risc-v/ch569w-evt/board/Kconfig Co-authored-by: Man, Jianting (Meco) <920369182@qq.com>