dedede: Require >15W to boot without a battery
dedede: Require >15W to boot without a battery

Waddledoo appears to have issues booting with just a 15W supply.
Therefore, this commit sets the minimum power required to boot to be
greater than 15W such that a PD contract is required. Otherwise, if the
battery is present and has greater than 1% SOC, then booting is
allowed.

BUG=b:150702984
BRANCH=None
TEST=build and flash waddledoo, plug in a 15W non PD charger, verify
 that the system does not attempt to boot the SoC.

Signed-off-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@google.com>
Change-Id: I165de0aa6c7185c8087328a427b0bb1eefb21e8d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2097137
Reviewed-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Commit-Queue: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Tested-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

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