usb-pd: svdm_dp_attention used bit & instead of logical &&
usb-pd: svdm_dp_attention used bit & instead of logical &&

The code works the same but it is not clear why the &&
was not chosen and no comments to give a reason. Since
both variables are always 0 or 1, the code will do
exactly the same thing but this is really what is
happening when you think about the logic behind this
comparison.

BUG=none
BRANCH=none
TEST=make buildall

Signed-off-by: Denis Brockus <6b21e8190fb5e373363fb95271367073a16474ef@google.com>
Change-Id: I4daf780e370978b468a5d1c22536b904a591e089
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2490733
Tested-by: Denis Brockus <6b21e8190fb5e373363fb95271367073a16474ef@chromium.org>
Auto-Submit: Denis Brockus <6b21e8190fb5e373363fb95271367073a16474ef@chromium.org>
Reviewed-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>
Reviewed-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Commit-Queue: Denis Brockus <6b21e8190fb5e373363fb95271367073a16474ef@chromium.org>

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