Increase max stack size when ll128 enabled

[ROCm/rccl commit: b098120c40]

projects/rccl/test/common/StandaloneUtils.hpp

@@ -27,7 +27,7 @@
 #define MAX_STACK_SIZE 112
 
 #ifdef ENABLE_LL128
-#define MAX_STACK_SIZE_gfx90a 288
+#define MAX_STACK_SIZE_gfx90a 296
 #else
 #define MAX_STACK_SIZE_gfx90a MAX_STACK_SIZE
 #endif