Reunify BUFFERSIZE across arm64 platforms to avoid segfaults in DYNAMIC_ARCH

common_arm64.h

@@ -142,14 +142,8 @@ REALNAME:
 #define HUGE_PAGESIZE   ( 4 << 20)
 
 #ifndef BUFFERSIZE
-#if defined(CORTEXA57)
-#define BUFFER_SIZE     (20 << 20)
-#elif defined(TSV110) || defined(EMAG8180)
 #define BUFFER_SIZE     (32 << 20)
 #else
-#define BUFFER_SIZE     (16 << 20)
-#endif
-#else
 #define BUFFER_SIZE	(32 << BUFFERSIZE)
 #endif