fpga: xilinx: spartan2: Setup NULL fpga_op without driver

Set fpga operations to NULL for cases where
FPGA is setup in board file but driver is not added.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/include/spartan2.h b/include/spartan2.h
index 2aca954..14606c3 100644
--- a/include/spartan2.h
+++ b/include/spartan2.h
@@ -38,7 +38,12 @@
 	xilinx_post_fn	post;
 } xilinx_spartan2_slave_serial_fns;
 
+#if defined(CONFIG_FPGA_SPARTAN2)
 extern struct xilinx_fpga_op spartan2_op;
+# define FPGA_SPARTAN2_OPS	&spartan2_op
+#else
+# define FPGA_SPARTAN2_OPS	NULL
+#endif
 
 /* Device Image Sizes
  *********************************************************************/
@@ -61,36 +66,47 @@
  *********************************************************************/
 /* Spartan-II devices */
 #define XILINX_XC2S15_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S15_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S15_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S30_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S30_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S30_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S50_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S50_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S50_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S100_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S100_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S100_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S150_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S150_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S150_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S200_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S200_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S200_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S50E_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S50E_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S50E_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S100E_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S100E_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S100E_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S150E_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S150E_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S150E_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S200E_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S200E_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S200E_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #define XILINX_XC2S300E_DESC(iface, fn_table, cookie) \
-{ xilinx_spartan2, iface, XILINX_XC2S300E_SIZE, fn_table, cookie, &spartan2_op }
+{ xilinx_spartan2, iface, XILINX_XC2S300E_SIZE, fn_table, cookie, \
+	FPGA_SPARTAN2_OPS }
 
 #endif /* _SPARTAN2_H_ */