staging: rtl8187se: Convert buffer typedef into a struct

The Documentation/CodingStyle doesn't recommend the use of typedef,
convert this to structure.
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8187se/r8180.h

@@ -167,11 +167,11 @@ typedef union _ThreeWire {
 } ThreeWireReg;
 
 
-typedef struct buffer {
+struct buffer {
 	struct buffer *next;
 	u32 *buf;
 	dma_addr_t dma;
-} buffer;
+};
 
 /* YJ,modified,080828. */
 struct stats {