Demo: Qemu-mps2 Enable DHCP by default (FreeRTOS#1107)

Co-authored-by: Gaurav-Aggarwal-AWS <[email protected]>

FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/FreeRTOSIPConfig.h

@@ -165,7 +165,7 @@ extern UBaseType_t uxRand();
  * set to 1 if a valid configuration cannot be obtained from a DHCP server for any
  * reason.  The static configuration used is that passed into the stack by the
  * FreeRTOS_IPInit() function call. */
-#define ipconfigUSE_DHCP                               0
+#define ipconfigUSE_DHCP                               1
 
 /* When ipconfigUSE_DHCP is set to 1, DHCP requests will be sent out at
  * increasing time intervals until either a reply is received from a DHCP server