staging: rtl8712: fixed coding style issues

Fixed some style and format issues with headers.

Signed-off-by: Javier M. Mellid <jmunhoz@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/rtl8712/rtl871x_rf.h b/drivers/staging/rtl8712/rtl871x_rf.h
index c709d8c..6c54966 100644
--- a/drivers/staging/rtl8712/rtl871x_rf.h
+++ b/drivers/staging/rtl8712/rtl871x_rf.h
@@ -22,7 +22,7 @@
 	u8	modem;
 };
 
-enum	_REG_PREAMBLE_MODE{
+enum	_REG_PREAMBLE_MODE {
 	PREAMBLE_LONG	= 1,
 	PREAMBLE_AUTO	= 2,
 	PREAMBLE_SHORT	= 3,