power: qpnp-fg: fix first_soc_done completion

The logic behind the first_soc_done completion is incorrect. Currently,
it is completed when the battery is missing, when it should be
reinitialized instead. Also, it should be completed after receiving a
first_soc_done interrupt. These bugs can cause the first SOC time to be
delayed by up to 3 seconds.

Make these changes to fix the delays.

CRs-Fixed: 904311
Change-Id: I79a09e5abdc4bf6e214f20c98d2d53165ddc1bea
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>