qpnp-fg-gen3: extend profile integrity word usage

Currently, profile integrity register is using only bit 0 to
indicate whether the profile is loaded or not. Now that the
profile can be loaded and/or fuel gauge can be restarted by the
bootloader, extend the usage of that word by using other bits
to provide more information. This is to aid the debugging.

Change-Id: Ib04ab10998de2f57b05cd976c3e9c8a1e2f4c574
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>