Fix copy-paste errors (POWER8/9 and extraneous return)

cpuid_power.c

@@ -156,7 +156,7 @@ int detect(void){
   if (!strncasecmp(p, "POWER6", 6)) return CPUTYPE_POWER6;
   if (!strncasecmp(p, "POWER7", 6)) return CPUTYPE_POWER6;
   if (!strncasecmp(p, "POWER8", 6)) return CPUTYPE_POWER8;
-  if (!strncasecmp(p, "POWER8", 6)) return CPUTYPE_POWER8;
+  if (!strncasecmp(p, "POWER9", 6)) return CPUTYPE_POWER8;
   if (!strncasecmp(p, "Cell",   4)) return CPUTYPE_CELL;
   if (!strncasecmp(p, "7447",   4)) return CPUTYPE_PPCG4;
   return CPUTYPE_POWER5;
@@ -180,7 +180,7 @@ int id;
 id = __asm __volatile("mfpvr %0" : "=r"(id));
 switch ( id >> 16 ) {
   case 0x4e: // POWER9
-    return  return CPUTYPE_POWER8;
+    return CPUTYPE_POWER8;
     break;
   case 0x4d:
   case 0x4b: // POWER8/8E