library update added DMA chain

PicoPiFi$ git submodule status
+643578e5bebd82b11bcad14e700ca9c2d7abc424 CherryUSB (v1.3.1-17-g643578e)
 6a7db34ff63345a7badec79ebea3aaef1712f374 pico-sdk (1.5.1)
PicoPiFi/pico-sdk/lib$ git submodule status
+2b49e57bd1fae85ac32ac1f41cdb7c794de335f6 btstack (v1.6.1)
+1d2227bca200e13c1d6a630032d5f6d7fca69fef cyw43-driver (v1.0.3-7-g1d2227b)
+73fcf72792a926a4e0ac8b656b29bff70552d927 lwip (STABLE-2_2_0_RELEASE-82-g73fcf727)
+cb854d5d19e05339448afb03839bee7f7e3ecd23 mbedtls (v3.6.0-607-gcb854d5d1)
+1ba88ff3ac939bbefb90e1fb2a7c4eb9a0c657f3 tinyusb (0.16.0-857-g1ba88ff3a)

Author: sidd-kishan

CherryUSB

@@ -10,6 +10,7 @@
 #include "hardware/watchdog.h"
 #include "pico/bootrom.h"
 #include "hardware/dma.h"
+#include "hardware/irq.h"
 
 // We're going to erase and reprogram a region 256k from the start of flash.
 // Once done, we can access this at XIP_BASE + 256k.
@@ -21,7 +22,10 @@ extern struct pbuf *out_pkt;
 extern bool link_up;
 static void  lwip_service_traffic(void);
 void printline(int cdc,char string[],int len);
-//extern int chan;
+void dma_handler();
+void dma_handler_2();
+extern int chan;
+extern int chan_2;
 
 extern char connect_ssid[190], connect_ssid_decode[95], connect_password[190], connect_password_decode[95], retry_ms[6], enc_type[1], wifi_configuration[450], 	wifi_configuration_last[450];
 extern int wifi_congfig_len;