sb_firmware_update: Remove battery HWID check
sb_firmware_update: Remove battery HWID check

We're supporting a wide range of batteries, and since file name
matching is based on HWID, we don't need to maintain a separate
table of supported HWIDs in our utility.

BUG=chrome-os-partner:49589,chrome-os-partner:50469
BRANCH=None
TEST=buildall

Change-Id: I3e7c62379c07a598e23f3c543959503d3d25aee3
Signed-off-by: Bruce.Wan <a898a81068da7266439365c3bd380deb6a0a895f@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/330231
Commit-Ready: Keith Tzeng <da46c95426f88ea5601cdbc4f519dbe947b85824@quantatw.com>
Tested-by: Bruce Wan <a898a81068da7266439365c3bd380deb6a0a895f@quantatw.com>
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>

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