voxel: Increase CHIPSET stack size
Prompted by observed stack overflow.
TEST=make buildall
BRANCH=volteer
TASK_ALWAYS(CHARGER, charger_task, NULL, VENTI_TASK_STACK_SIZE) \
TASK_ALWAYS(MOTIONSENSE, motion_sense_task, NULL, VENTI_TASK_STACK_SIZE) \
TASK_NOTEST(KEYPROTO, keyboard_protocol_task, NULL, TASK_STACK_SIZE) \
- TASK_NOTEST(CHIPSET, chipset_task, NULL, LARGER_TASK_STACK_SIZE) \
+ TASK_NOTEST(CHIPSET, chipset_task, NULL, ULTRA_TASK_STACK_SIZE) \
TASK_ALWAYS(HOSTCMD, host_command_task, NULL, LARGER_TASK_STACK_SIZE) \
TASK_ALWAYS(CONSOLE, console_task, NULL, VENTI_TASK_STACK_SIZE) \
TASK_ALWAYS(POWERBTN, power_button_task, NULL, LARGER_TASK_STACK_SIZE) \
