Changed multi-line C comments into another style.

The left side doesn't look unbalanced.

src/common/cpu.c

@@ -119,8 +119,8 @@ int ValidAddrSizeForCPU (unsigned char AddrSize)
 
 cpu_t FindCPU (const char* Name)
 /* Find a CPU by name and return the target id. CPU_UNKNOWN is returned if
- * the given name is no valid target.
- */
+** the given name is no valid target.
+*/
 {
     unsigned I;