guybrush: Remove early bringup flag
Board power on is going OK. This flag is no longer needed.
TEST=Build
BRANCH=None
/* Optional features */
#define CONFIG_SYSTEM_UNLOCKED /* Allow dangerous commands while in dev. */
#define CONFIG_LTO /* Link-Time Optimizations to reduce code size */
-#define CONFIG_BRINGUP /* EC will not automatically power on the AP */
#define CONFIG_I2C_DEBUG /* Print i2c traces */
#define CONFIG_KEYBOARD_DEBUG /* Print keyboard debug messages */
