staging:ath6kl:Correcting the typo

1) ATH6K_CONFIG_HIF_VIRTUAL_SCATTER needs to be
   ATH6KL_CONFIG_HIF_VIRTUAL_SCATTER in file ar6000_drv.h
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/ath6kl/os/linux/include/ar6000_drv.h

@@ -222,11 +222,11 @@ typedef enum _AR6K_BIN_FILE {
 #define ENABLEUARTPRINT_DEFAULT    0
 #endif /* ENABLEARTPRINT_SET */
 
-#ifdef ATH6K_CONFIG_HIF_VIRTUAL_SCATTER
+#ifdef ATH6KL_CONFIG_HIF_VIRTUAL_SCATTER
 #define NOHIFSCATTERSUPPORT_DEFAULT    1
-#else /* ATH6K_CONFIG_HIF_VIRTUAL_SCATTER */
+#else /* ATH6KL_CONFIG_HIF_VIRTUAL_SCATTER */
 #define NOHIFSCATTERSUPPORT_DEFAULT    0
-#endif /* ATH6K_CONFIG_HIF_VIRTUAL_SCATTER */
+#endif /* ATH6KL_CONFIG_HIF_VIRTUAL_SCATTER */
 
 
 #if defined(CONFIG_ATH6KL_ENABLE_COEXISTENCE)