Reduce differences with cy_pci.c: add a description of this file, and

don't use too many tabs in declarations.

Attempt to complete KNFization of this file (1 more indentation fix).

sys/dev/cy/cy_isa.c

@@ -28,6 +28,10 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+/*
+ * Cyclades Y ISA serial interface driver
+ */
+
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");