power: qpnp-qg: Update the condition to hold-SOC

Hold the SOC to 1 as long as system_soc is lesser
than 0.5% and VBAT is above cutoff. This is to avoid
pre-mature reporting of 0%.

Change-Id: I4b26edc1ac6c114b486ca4ad3e1703b296760947
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>