zephyr: ap_pwrseq: Optionally skip shim virtual wire support
zephyr: ap_pwrseq: Optionally skip shim virtual wire support

The Zephyr AP power sequence subsys does not require the
shim virtual wire support. Save memory and latency.

BUG=b:203446068
TEST=zmake testall
BRANCH=none

Signed-off-by: Andrew McRae <44ad1424cfc8411c96d9181798ca41ae55709dfb@google.com>
Change-Id: Ifcc3162ae80d06bd515b1160d74659f2bcb8883a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3583917
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