clean up duplicate assignment of cpus newer than POWER10

Author: martin-frbg

driver/others/dynamic_power.c

@@ -69,7 +69,7 @@ static int cpuid(void)
     else if (arch == POWER_9) return CPU_POWER9;
 #endif
 #ifdef POWER_10
-    else if (arch >= POWER_10) return CPU_POWER10;
+    else if (arch == POWER_10) return CPU_POWER10;
 #endif
 #ifdef POWER_11
     else if (arch >= POWER_11) return CPU_POWER10;