anahera: Set rpm deviation to 1%
anahera: Set rpm deviation to 1%

Currently rpm deviation is 7%, it is too large to cause fan rpm
between actual and target is not accurate. This patch set lower
rpm deviation to 1%.

BUG=b:199246802
BRANCH=none
TEST=run ectool pwmsetfanrpm 4000 ~ 4500 rpm.
make sure fan actual rpm is accurate.

Signed-off-by: Devin Lu <052fe648504800b810f29702ef4f3db83fad68bf@quantatw.com>
Change-Id: I44562ea6946e2eaea3fd3cde5de28f7a45526f60
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3197901
Reviewed-by: caveh jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>
Commit-Queue: caveh jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>

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