sam4e8e: Enable SAM4 cache at startup

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

src/sam4e8e/main.c

@@ -43,6 +43,12 @@ int
 main(void)
 {
     SystemInit();
+
+    // Enable Cache
+    if (!(CMCC->CMCC_SR & CMCC_SR_CSTS))
+        CMCC->CMCC_CTRL = CMCC_CTRL_CEN;
+
+    // Start main loop
     sched_main();
     return 0;
 }