Ivan Grokhotkov 339267ffc9 Merge branch 'feature/bootloader_rng' into 'master'
Enable bootloader entropy source for RNG

Enables an entropy source when bootloader starts up, which both seeds the RNG for use before WiFi/BT stack is enabled and provides an adequate RNG for secure boot & flash encryption key generation.

A prerequisite was enabling 80MHz operation, so the CPU is now set to 80MHz as soon as second stage bootloader starts running.

See merge request !363
2017-01-07 18:46:10 +08:00
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