sfc: Use explicit bool for boolean variables, parameters and return values

Replace (cond ? 1 : 0) with cond or !!cond as appropriate, and
(cond ? 0 : 1) with !cond.

Remove some redundant boolean temporaries.

Rename one field that looks like a flag but isn't.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/sfc/phy.h b/drivers/net/sfc/phy.h
index 9d02c84..25bd18e 100644
--- a/drivers/net/sfc/phy.h
+++ b/drivers/net/sfc/phy.h
@@ -23,7 +23,7 @@
 
 extern void tenxpress_set_state(struct efx_nic *efx,
 				enum tenxpress_state state);
-extern void tenxpress_phy_blink(struct efx_nic *efx, int blink);
+extern void tenxpress_phy_blink(struct efx_nic *efx, bool blink);
 extern void tenxpress_crc_err(struct efx_nic *efx);
 
 /****************************************************************************