v21.12 service pack 4, SP 4 or also known as v21.12.4

• Updated postmarketos-tweaks to 0.11
• Updated powersupply to 0.6 so it doesn't crash when the keyboard is attached
• Added fix for lima timeout and screen flickering on the pinephone
• updated the odroid-hc2 kernel to 5.16.14
• updated the nokia-n900 kernel to 5.15.31
• updated the sdm845 kernel to 5.17.0
• New device: samsung-espresso3g
• added call audio bits for the sdm845 devices

ref: #1459 (closed)