chelsio: Remove remnants of CONFIG_CHELSIO_T1_COUGAR

CONFIG_CHELSIO_T1_COUGAR cannot be set (it appears nowhere in any
Kconfig files), and the code it protects could never build (cspi.h was
never added to the kernel tree).  Therefore it's pretty safe to remove
all vestiges of this dead code.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/chelsio/common.h

@@ -286,7 +286,6 @@ struct board_info {
 	unsigned int            clock_mc3;
 	unsigned int            clock_mc4;
 	unsigned int            espi_nports;
-	unsigned int            clock_cspi;
 	unsigned int            clock_elmer0;
 	unsigned char           mdio_mdien;
 	unsigned char           mdio_mdiinv;