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Enable (t)rng support for STM32H7 and NANO RP2040#895
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This PR enables TRNG support for STM32H7 boards: Portenta H7 OPTA GIGA and NiclaVision.
https://www.st.com/resource/en/application_note/dm00073853.pdf
And pseudo random number generation for RP2040 CONNECT using multiple hardware sources of entropy:
TRNG is automatically used as seed for
random()libc functions ifrandom(max)orrandom(min,max)are called from the Sketch. Alternatively user can still usesrandom()to manually seed therandom()function.This PR contains a patch, please check patch number before merging