【修改】ppp_chat.h头文件位置

Signed-off-by: liuxianliang <liuxianliang@rt-thread.com>

class/air720/ppp_device_air720.c

@@ -9,6 +9,7 @@
  */
 
 #include <ppp_device_air720.h>
+#include <ppp_chat.h>
 
 #define DBG_TAG    "ppp.air720"
 

class/air720/ppp_device_air720.h

@@ -12,7 +12,6 @@
 #define __PPP_AIR720_H__
 
 #include <ppp_device.h>
-#include <ppp_chat.h>
 
 /* ppp_device base from ppp_device */
 struct ppp_air720

class/m6312/ppp_device_m6312.c

@@ -9,6 +9,7 @@
  */
 
 #include <ppp_device_m6312.h>
+#include <ppp_chat.h>
 
 #define DBG_TAG    "ppp.m6312"
 

class/m6312/ppp_device_m6312.h

@@ -12,7 +12,6 @@
 #define __PPP_M6312_H__
 
 #include <ppp_device.h>
-#include <ppp_chat.h>
 
 /* ppp_device base from ppp_device */
 struct ppp_m6312

class/sim800/ppp_device_sim800.c

@@ -9,6 +9,7 @@
  */
 
 #include <ppp_device_sim800.h>
+#include <ppp_chat.h>
 
 #define DBG_TAG    "ppp.sim800"
 

class/sim800/ppp_device_sim800.h

@@ -12,7 +12,6 @@
 #define __PPP_AIR720_H__
 
 #include <ppp_device.h>
-#include <ppp_chat.h>
 
 /* ppp_device base from ppp_device */
 struct ppp_sim800