Increase BUFFERSIZE for and use same value for POWER6
to fix overflow warning for PWR8 ZGEMM and PWR9 C/ZGEMM and avoid size mismatches in DYNAMIC_ARCH
@@ -844,8 +844,8 @@ Lmcount$lazy_ptr:
#define BUFFER_SIZE ( 2 << 20)
#elif defined(PPC440FP2)
#define BUFFER_SIZE ( 16 << 20)
-#elif defined(POWER8) || defined(POWER9) || defined(POWER10)
-#define BUFFER_SIZE ( 64 << 20)
+#elif defined(POWER6) || defined(POWER8) || defined(POWER9) || defined(POWER10)
+#define BUFFER_SIZE ( 32 << 22)
#else
#define BUFFER_SIZE ( 16 << 20)
#endif
