If copy_from_user() does not return 0 we'll leak the memory we
allocated for 'params' when that variable goes out of scope.

Also a small CodingStyle cleanup: Use braces on both branches of
if/else when one branch needs it.
Signed-off-by: NJesper Juhl <jj@chaosbits.net>
Acked-by: NVinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>