bobba: Change FIFO settings
bobba: Change FIFO settings

Overly large sensor batches lead to timestamp synchronization
issues on bobba, causing - among others - CTS to sometimes
fail the sensor batching tests.

This patch reduce the size of the FIFO, with the same rationale as
CL:1354484 did for Nocturne.

BUG=b:120508077
TEST=run CTS, observe tests passing

Change-Id: I40cde8e4570e87a6fd192331d69e6deb2891cbf7
Signed-off-by: Enrico Granata <f861e98f10aee98dc7dce70e80887ecdfdeb65b1@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1387348
Commit-Ready: ChromeOS CL Exonerator Bot <fa429e5907f00867f797423aea74327bb02c91b6@appspot.gserviceaccount.com>
Reviewed-by: Gwendal Grignou <190c5a5edfcf62e0246559bf31fa7548674de3ad@chromium.org>
Reviewed-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>

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