[v1.03][RISCV] Implementing basic skeleton for RISC-V backend

src/riscv/soc.c

@@ -0,0 +1,9 @@
+#include "soc.h"
+
+char* get_str_process(struct system_on_chip* soc) {
+  return "-1 nm";
+}
+
+char* get_soc_name(struct system_on_chip* soc) {
+  return "Unknown";
+}