eve: Increase the minimum battery level needed for try source
eve: Increase the minimum battery level needed for try source

To improve robustness of booting under low battery condidtions,
increased the thershold CONFIG_USB_PD_TRY_SRC_MIN_BATT_SOC from 1 to
2. The effect of this change is that try srouce mode will be disabled
until the battery has >= 2% of charge. This prevents the port from
disconnecting, when a USB PD charge is connected under this low
battery condition.

BUG=b:36093023
BRANCH=None
TEST=Verfied that when the battery charge was  < 2% the USB PD state
machine on Eve did not go to state 15 (SRC_DISCONNECTED) after
initially attaching as a sink device. When the battery charge is >= 2%
then observed that the transition to state 15 happens.

Change-Id: I50123bc4f98e7a8dc793d9a9844d1d9961fde121
Signed-off-by: Scott <7d40b3eb9e17bf55d972074a5e77a7ea4159f9dd@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/452739
Commit-Ready: Scott Collyer <7d40b3eb9e17bf55d972074a5e77a7ea4159f9dd@chromium.org>
Tested-by: Scott Collyer <7d40b3eb9e17bf55d972074a5e77a7ea4159f9dd@chromium.org>
Reviewed-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@google.com>

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