e9b683d0b3
RT_USING_STDC_ATOMIC is a user selected option on current config system. While the RT_USING_HW_ATOMIC is a forced option selected by Kconfig under libcpu. And the RT_USING_STDC_ATOMIC will be meaningless if we set RT_USING_HW_ATOMIC to first priority if the arch has hw-atomic. Changes: - set RT_USING_STDC_ATOMIC to first priority on rttypes.h Signed-off-by: Shell <smokewood@qq.com>