lqb/rt-thread

réplica de https://gitee.com/rtthread/rt-thread.git

Autor	SHA1 Mensaxe	Data
Grissiom	e1e563e85c cortex-r4: remove RM48x50.h and add armv7.h	%!s(int64=11) %!d(string=hai) anos
Grissiom	009239ceed rm48x50: rt_interrupt_nest should be `volatile rt_uint8_t`	%!s(int64=12) %!d(string=hai) anos
Grissiom	e74befca44 move libcpu/arm/rm48x50/ to libcpu/arm/cortex-r4	%!s(int64=12) %!d(string=hai) anos