Added soclet with gpio banks to top

sw/sweep/sweep.c

@@ -0,0 +1,14 @@
+#include <stdint.h>
+
+#define GPIO_BASE 0x40000000u
+
+static volatile uint32_t * const R_FREQ = (volatile uint32_t *)GPIO_BASE;
+
+void main(){
+    for(;;){
+        for(int i=1000; i<10000; i++){
+            *R_FREQ = i;
+            for(int j=0; j<100; j++) asm volatile("nop");
+        }
+    }
+}