Add tunings for baseline AArch64

Previously this was left without `SWITCH_RATIO` or `GEMM_PREFERED_SIZE` and older default values, but it can be seen across other cores that these values seem to work for many devices.

param.h

@@ -3708,6 +3708,14 @@ Until then, just keep it different than DGEMM_DEFAULT_UNROLL_N to keep copy rout
 
 #else /* Other/undetected ARMv8 cores */
 
+#if defined(XDOUBLE) || defined(DOUBLE)
+#define SWITCH_RATIO            8
+#define GEMM_PREFERED_SIZE      4
+#else
+#define SWITCH_RATIO            16
+#define GEMM_PREFERED_SIZE      8
+#endif
+
 #define SGEMM_DEFAULT_UNROLL_M  16
 #define SGEMM_DEFAULT_UNROLL_N  4
 
@@ -3720,13 +3728,13 @@ Until then, just keep it different than DGEMM_DEFAULT_UNROLL_N to keep copy rout
 #define ZGEMM_DEFAULT_UNROLL_M  4
 #define ZGEMM_DEFAULT_UNROLL_N  4
 
-#define SGEMM_DEFAULT_P	128
-#define DGEMM_DEFAULT_P	160
+#define SGEMM_DEFAULT_P	240
+#define DGEMM_DEFAULT_P	240
 #define CGEMM_DEFAULT_P 128
 #define ZGEMM_DEFAULT_P 128
 
-#define SGEMM_DEFAULT_Q 352
-#define DGEMM_DEFAULT_Q 128
+#define SGEMM_DEFAULT_Q 640
+#define DGEMM_DEFAULT_Q 320
 #define CGEMM_DEFAULT_Q 224
 #define ZGEMM_DEFAULT_Q 112