power: qpnp-smbcharger: Add POWER_SUPPLY_PROP_MAX_PULSE_ALLOWED property

Use this property to specify the maximum pulses which can be allowed
during HVDCP3. The DT property 'qcom,max-pulse-allowed' can be
specified to initialize this value.

CRs-Fixed: 1047232
Change-Id: I3d1aa92b16d2103b7f3df88ca948423c202b17ef
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>