motion_sense: Print motion sensors count for accelinfo command
motion_sense: Print motion sensors count for accelinfo command

For the accelinfo EC console command this code prints number of motion
sensors count also. With this, we can get number of sensors connected
on DUT before testing them individually by test scripts.

BUG=none
BRANCH=none
TEST=Manually tested on Bobba convertible and clamp-shell,
     can get the correct number of sensors connected on the board.

Change-Id: If1de15756db8718d7e95997fc83593ed55fa29a3
Signed-off-by: Vijay Hiremath <006c712879a3af08bfdb5c2b8491a8b2d5fd73cd@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/1372508
Commit-Ready: Vijay P Hiremath <006c712879a3af08bfdb5c2b8491a8b2d5fd73cd@intel.com>
Tested-by: Vijay P Hiremath <006c712879a3af08bfdb5c2b8491a8b2d5fd73cd@intel.com>
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