bloog: add support keyboard backlight
BRANCH=octopus
TEST=make buildall -j, make sure ec console kbkight
can adjust keyboard backlight brightness.
Commit-Ready: Marco Chen
#define CONFIG_LID_ANGLE_UPDATE
#define CONFIG_LID_ANGLE_SENSOR_BASE BASE_ACCEL
#define CONFIG_LID_ANGLE_SENSOR_LID LID_ACCEL
-
+#define CONFIG_PWM
+#define CONFIG_PWM_KBLIGHT
#define CONFIG_TEMP_SENSOR
#define CONFIG_THERMISTOR
#define CONFIG_STEINHART_HART_3V3_13K7_47K_4050B
