sfc: Remove obsolete comment about PCI modes

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/sfc/falcon_hwdefs.h b/drivers/net/sfc/falcon_hwdefs.h
index e319fd6..5d584b0 100644
--- a/drivers/net/sfc/falcon_hwdefs.h
+++ b/drivers/net/sfc/falcon_hwdefs.h
@@ -117,7 +117,6 @@
 #define SF_PRST_WIDTH 1
 #define EE_PRST_LBN 8
 #define EE_PRST_WIDTH 1
-/* See pic_mode_t for decoding of this field */
 /* These bit definitions are extrapolated from the list of numerical
  * values for STRAP_PINS.
  */