Merge pull request #445 from wzyy2/master

x86: fix compile error in c++

bsp/x86/drivers/include/bsp.h

@@ -16,6 +16,10 @@
 
 #include <i386.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+ 
 /*******************************************************************/
 /*  Timer Register  */
 /*******************************************************************/

bsp/x86/drivers/include/i386.h

@@ -105,4 +105,8 @@ struct Pseudodesc {
 #define 	STS_IG32 			0xe		// 32-bit Interrupt Gate
 #define 	STS_TG32 			0xf		// 32-bit Trap Gate
 
+#ifdef __cplusplus
+ }
+#endif
+
 #endif