Mancomb: Remove CONFIG_BRINGUP
Monkey Island is far enough along that CONFIG_BRINGUP can be removed
from mancomb.
BRANCH=None
TEST=make -j buildall; load on mancomb and observe the bringup banner is
gone
/* 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 */
#undef CONFIG_UART_TX_BUF_SIZE
