move uf2 led blink fast to ghostfat

src/usb/uf2/ghostfat.c

@@ -280,6 +280,13 @@ int write_block(uint32_t block_no, uint8_t *data, bool quiet/*, WriteState *stat
     } else {
         // logval("write block at", bl->targetAddr);
         NRF_LOG_DEBUG("Write block at %x", bl->targetAddr);
+
+        static bool first_write = true;
+        if ( first_write ) {
+          first_write = false;
+          led_blink_fast(true);
+        }
+    
         flash_write(bl->targetAddr, bl->data, bl->payloadSize);
     }
 
@@ -299,13 +306,7 @@ int write_block(uint32_t block_no, uint8_t *data, bool quiet/*, WriteState *stat
                 state->numWritten++;
             }
             if (state->numWritten >= state->numBlocks) {
-                // wait a little bit before resetting, to avoid Windows transmit error
-                // https://github.com/Microsoft/uf2-samd21/issues/11
-                if (!quiet) {
-
-                }
-
-                // flush last blocks if needed
+                // flush last blocks
                 flash_flush();
 
                 uf2_write_complete(state->numBlocks);