zephyr: remove guard to call of lpc_s3_resume_clear_masks
zephyr: remove guard to call of lpc_s3_resume_clear_masks

This function is shimmed now, we can take away the guard.

BUG=b:172678200
BRANCH=none
TEST=power on volteer

Signed-off-by: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>
Change-Id: I7589b3485930e8d40966e9e71434b98648018872
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2615130
Commit-Queue: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>
Reviewed-by: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>

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