main/linux-postmarketos-qcom-msm8939: upgrade to 5.14

Upgrade from 5.7-rc4 to 5.14 (on top of msm8916's 5.14 branch).

Device changes:

• alcatel-idol3: Initial support (contributed by @vknecht)
• bq-piccolo: Initial support (contributed by @a_a)

cc @Newbyte