Added the portTASK_FUNCTION_PROTO macros around the timer task, as the macros are already used by the idle task.
Add a PDF of the RISC-V documentation into the repo as the web page is not yet live.
#warning configCLINT_BASE_ADDRESS must be defined in FreeRTOSConfig.h. If the target chip includes a Core Local Interrupter (CLINT) then set configCLINT_BASE_ADDRESS to the CLINT's base address. Otherwise set configCLINT_BASE_ADDRESS to 0.
#warning configCLINT_BASE_ADDRESS must be defined in FreeRTOSConfig.h. If the target chip includes a Core Local Interrupter (CLINT) then set configCLINT_BASE_ADDRESS to the CLINT base address. Otherwise set configCLINT_BASE_ADDRESS to 0.
#endif
/* Let the user override the pre-loading of the initial LR with the address of