updated cpu clock initialisation to new method in klib

flash/flash_device.cpp

@@ -177,7 +177,7 @@ int __attribute__ ((noinline)) Init(const uint32_t address, const uint32_t frequ
 
     // setup the clock to 96Mhz (this is using the internal 4Mhz oscillator)
     // (((47 + 1) * 2 * 4Mhz) / (0 + 1) = 384Mhz) / (3 + 1) = 96Mhz
-    clock::set_main<clock::source::internal, 96'000'000, 47, 0, 3>();
+    clock::set_main<clock::source::internal, 4'000'000, 48, 1, 4>();
 
     // init the cs pin
     cs::init();