eldrid: disable CONFIG_KEYBOARD_VIVALDI
eldrid: disable CONFIG_KEYBOARD_VIVALDI

Disable Vivaldi keyboard since Vivaldi currently does not
allow for side volume buttons to be distinguished from
keyboard volume F9/F10 keys. This is necessary so that Chrome
can ignore F9/F10 in tablet mode, but side volume buttons still work.

BUG=b:171815391
BRANCH=volteer
TEST=make -j BOARD=eldrid
TEST=make buildall
TEST=test on eldrid, side-buttons work in clamshell/tablet mode
and that F9/F10 only work in clamshell.

Signed-off-by: Scott Chao <8cefa9751fac9aaa897ba1213763a96ba8dbd20d@wistron.corp-partner.google.com>
Change-Id: I168521d80e1ff1e4103485a8c25c440cb5b08ce9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2503749
Reviewed-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>

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