hatch_fp/board: Set correct TIM_WATCHDOG for bloonchipper
hatch_fp/board: Set correct TIM_WATCHDOG for bloonchipper

Timer 16 doesn't exist on STM32F4 (see __hw_timer_enable_clock() in
chip/stm32/hwtimer32.c). Changed TIM_WATCHDOG to timer which is not
used.

BUG=b:196391184 b:152048657
BRANCH=none
TEST=Flash on dragonclaw. Issue 'crash watchdog' and check if warning
     appears before reset.

Signed-off-by: Patryk Duda <6aed17a362577cf10cb5675888c1635d522769c1@semihalf.com>
Change-Id: Iab9548dba045f500ab0249c561e287c7ba160f14
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3118289
Tested-by: Patryk Duda <213d388d1c6ea6afd34b87da9fc4415c3231b04c@google.com>
Tested-by: Tom Hughes <fc5c12f30a5ed2baa0581f44ee14ad1eb7b20d83@chromium.org>
Reviewed-by: Tom Hughes <fc5c12f30a5ed2baa0581f44ee14ad1eb7b20d83@chromium.org>
Commit-Queue: Tom Hughes <fc5c12f30a5ed2baa0581f44ee14ad1eb7b20d83@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec