Reduce number of tested rows in synram_rw test from 32 to 8 for HX

* reduces simulation runtime linearly

Change-Id: I4bbc92161689962c646e08dd00be1503a398e53f

test/test_synram_rw.cpp

@@ -7,9 +7,10 @@
 #ifndef LIBNUX_DLS_VERSION_VX
 #define SYNAPSE_ROW_ITERATIONS dls_num_synapse_vectors
 #else
-// Use 32 vectors on HX fitting in the vector registers
-// Otherwise there is not enough memory
-#define SYNAPSE_ROW_ITERATIONS 32
+// Use 8 of 32 vectors on HX fitting in the vector registers
+// For more than 32 there is not enough memory
+// 8 is used in order to reduce the runtime in simulation
+#define SYNAPSE_ROW_ITERATIONS 8
 #endif
 
 void set_synram_random(uint32_t const base_address, uint32_t const mask, uint32_t seed) {