Remove driver files that generate compiler warnings from the RISC-V_Renode_Emulator_SoftConsole project.

Update RISC-V ports so the interrupt stack is set to a known value before the scheduler is started if the interrupt stack is statically defined rather than re-using the main.c() stack.

FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1_IAR/FreeRTOSConfig.h

@@ -57,7 +57,7 @@
 #define configIDLE_SHOULD_YIELD			0
 #define configUSE_MUTEXES				1
 #define configQUEUE_REGISTRY_SIZE		8
-#define configCHECK_FOR_STACK_OVERFLOW	3
+#define configCHECK_FOR_STACK_OVERFLOW	2
 #define configUSE_RECURSIVE_MUTEXES		1
 #define configUSE_MALLOC_FAILED_HOOK	1
 #define configUSE_APPLICATION_TASK_TAG	0