drm/vmwgfx: Fix host message module function declarations

Make the host message module function declarations similar to the other
declarations in vmwgfx_drv.h and include the header in vmwgfx_msg.c
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>

drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

@@ -1230,6 +1230,11 @@ int vmw_bo_cpu_blit(struct ttm_buffer_object *dst,
 		    u32 w, u32 h,
 		    struct vmw_diff_cpy *diff);
 
+/* Host messaging -vmwgfx_msg.c: */
+int vmw_host_get_guestinfo(const char *guest_info_param,
+			   char *buffer, size_t *length);
+int vmw_host_log(const char *log);
+
 /**
  * Inline helper functions
  */
@@ -1309,10 +1314,4 @@ static inline void vmw_mmio_write(u32 value, u32 *addr)
 {
 	WRITE_ONCE(*addr, value);
 }
-
-/**
- * Add vmw_msg module function
- */
-extern int vmw_host_log(const char *log);
-
 #endif

drivers/gpu/drm/vmwgfx/vmwgfx_msg.c

@@ -31,6 +31,7 @@
 #include <linux/frame.h>
 #include <asm/hypervisor.h>
 #include <drm/drmP.h>
+#include "vmwgfx_drv.h"
 #include "vmwgfx_msg.h"