Import NMSIS #2
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Import NMSIS #2
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remove riscv_bits.h and riscv_encoding.h that is exists same name file in NMSIS directory riscv_const.h changes into simple wrapper to riscv_bits.h
- replace read/write/set/clear CSR macros to __RV_CSR_* - rewrite ECLIC control function with NMSIS's macros - definitions in header are redefined with NMSIS's definitions
- remove unused header include - rewrite ECLIC initialization with NMSIS function
add return statement to __wrap_printf
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NMSIS(https://github.com/Nuclei-Software/NMSIS) is a common definition for Nuclei RISC-V core that release from Nuclei System.
It's a good replacement from n200_*.h headers that this repository contains.
NMSIS are well-organized sources, actively develop.
I think importing it will help maintain this driver.
This PR is import NMSIS to GD32VF103_Firmware_Library.
Files in "RISCV" are modified to keep compatibility.
(Newly added NMSIS directory needs to add to compiler option.
PlatformIO's sample is here. https://github.com/soburi/platform-gd32v/tree/nmsis
And need to add include "nmsis_core.h" line to head of libopt.h.)