Remove unused __power_11 macro and address review comments

Signed-off-by: Peter Shipton <[email protected]>

runtime/port/unix/j9sysinfo.c

@@ -257,17 +257,12 @@ static intptr_t getAIXPPCDescription(struct J9PortLibrary *portLibrary, J9Proces
 #define __power_10() (_system_configuration.implementation == POWER_10)
 #endif /* !defined(__power_10) */
 
-#if !defined(__power_11)
-#define POWER_11 0x80000 /* Power 11 class CPU */
-#define __power_11() (_system_configuration.implementation == POWER_11)
-#endif /* !defined(__power_11) */
-
 /*
  * Please update the macro below to stay in sync with the latest POWER processor known to OpenJ9,
  * ensuring CPU recognition is more robust than in the past. As the macro currently stands, any
  * later processors are recognized as at least POWER11.
  */
-#define POWER11_OR_ABOVE (0xFFFFFFFF << 19)
+#define POWER11_OR_ABOVE (0xFFFFFF00 << 11)
 #define __power_latestKnownAndUp() J9_ARE_ANY_BITS_SET(_system_configuration.implementation, POWER11_OR_ABOVE)
 
 #if defined(J9OS_I5_V6R1) /* vmx_version id only available since TL4 */
@@ -591,7 +586,7 @@ mapPPCProcessor(const char *processorName)
 	} else if (0 == strncasecmp(processorName, "power9", 6)) {
 		rc = PROCESSOR_PPC_P9;
 	} else if (0 == strncasecmp(processorName, "power10", 7)) {
-                rc = PROCESSOR_PPC_P10;
+		rc = PROCESSOR_PPC_P10;
 	} else if (0 == strncasecmp(processorName, "power11", 7)) {
 		rc = PROCESSOR_PPC_P11;
 	}
@@ -647,7 +642,7 @@ getAIXPPCDescription(struct J9PortLibrary *portLibrary, J9ProcessorDesc *desc)
 		desc->processor = PROCESSOR_PPC_P9;
 	} else if (__power_10()) {
 		desc->processor = PROCESSOR_PPC_P10;
-        } else if (__power_latestKnownAndUp()) {
+	} else if (__power_latestKnownAndUp()) {
 		desc->processor = PROCESSOR_PPC_P11;
 	} else {
 		desc->processor = PROCESSOR_PPC_UNKNOWN;