8206265: aarch64 jtreg: assert in TestOptionsWithRanges.jtr

Summary: Limit flag range to don't overflow 12bit instruction operand
Reviewed-by: aph, dsamersoff
Contributed-by: boris.ulasevich@bell-sw.com

src/hotspot/cpu/aarch64/globals_aarch64.hpp

@@ -164,7 +164,7 @@ define_pd_global(intx, InlineSmallCode,          1000);
   product(int, SoftwarePrefetchHintDistance, -1,                        \
           "Use prfm hint with specified distance in compiled code."     \
           "Value -1 means off.")                                        \
-          range(-1, 32760)
+          range(-1, 4096)
 #endif