qcom-charger: qpnp-fg-gen3: add flag to bypass SRAM read/write wake lock

In the suspend path a wakelock should not be held. Add a flag to bypass
holding a wakelock during an SRAM read or write so that they can be used
in the suspend path.

Change-Id: I74ccae4e9b5aeccf261cc94e9bb89138d7d48345
Signed-off-by: Nicholas Troast <ntroast@codeaurora.org>