zephyr: zmake: Drop success and info messages
zephyr: zmake: Drop success and info messages

Update the filter to assume everything it doesn't know about is an
error. This is safer than leaving it as an INFO message.

On the other hand, build success should be assumed unless otherwise
notified, so move the *** SUCCESS *** message and associated asterisk
lines to DEBUG.

The build ends with a note about memory usage. This is helpful, but is
not an error, so show it on the default INFO.

BUG=b:177096315
BRANCH=none
TEST=manually test by running zmake configure / build

Signed-off-by: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>
Change-Id: Ief932c2f6343049c0b21493231c72c0390bfd444
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2788847
Reviewed-by: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>

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