k256: add more inlines for better efficiency (#999) #191

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	1m 5s
build (1.65.0, wasm32-unknown-unknown)	1m 4s
cross (armv7-unknown-linux-gnueabihf, 1.65.0)	2m 9s
build (stable, thumbv7em-none-eabi)	17s
cross (armv7-unknown-linux-gnueabihf, stable)	1m 25s
build (stable, wasm32-unknown-unknown)	16s
cross (aarch64-unknown-linux-gnu, 1.65.0)	2m 5s
cross (aarch64-unknown-linux-gnu, stable)	1m 9s
doc	22s
cross (powerpc-unknown-linux-gnu, 1.65.0)	2m 16s
cross (powerpc-unknown-linux-gnu, stable)	1m 19s
test (i686-unknown-linux-gnu, 1.65.0, sudo apt update && sudo apt install gcc-multilib)	2m 18s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 17s
test (x86_64-unknown-linux-gnu, 1.65.0)	1m 55s
test (x86_64-unknown-linux-gnu, stable)	51s
	19m 48s

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