power: power_supply: Add property to limit pulses for HVDCP

Use the property POWER_SUPPLY_PROP_MAX_PULSE_ALLOWED to
specify the maximum pulses which can be supported for
HVDCP3. This is used to limit the VBUS to a max value.

CRs-Fixed: 1047232
Change-Id: I85677ba574ff3da2a38e06a2f25a43e80ae150d6
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>