Miyoo Flip BaseOS v1.3.0

Read the installation instructions in INSTALL.md.

This release focuses on power consumption and battery life improvements It may improve the battery life by up to 1 hour while WiFi and BT are off. It includes the following changes:

• The device starts after pushing the power button for only 500 ms while charging (instead of 2 s), consistent with behavior while not charging
• The DDR clock rate was boosted by miyoo_inputd registering many stick events per second, making it virtually clamped at its max frequency. SYS_STATUS_BOOST is now disabled, allowing DDR to scale normally with load (~150 mW)
• Cut off power to the radio chip when both WiFi and BT are off (~300 mW)
• Allow to charge at up to 2500 mA while off if the charger allows it (up from 1500 mA, already enabled when device is on)
• Fixed a delay in DHCP, allowing to connect to WiFi in less than 10 s instead of more than 30 s

The battery gains may be less in SpruceOS, as there was already a clamp on DDR frequency, and logic to cut off the radio chip. It will however not conflict.