fpga: xilinx: virtex2: 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/virtex2.h b/include/virtex2.h
index 7b7825f..5944bbc 100644
--- a/include/virtex2.h
+++ b/include/virtex2.h
@@ -11,8 +11,6 @@
 
 #include <xilinx.h>
 
-extern struct xilinx_fpga_op virtex2_op;
-
 /*
  * Slave SelectMap Implementation function table.
  */
@@ -40,6 +38,13 @@
 	xilinx_wdata_fn	wdata;
 } xilinx_virtex2_slave_serial_fns;
 
+#if defined(CONFIG_FPGA_VIRTEX2)
+extern struct xilinx_fpga_op virtex2_op;
+# define FPGA_VIRTEX2_OPS	&virtex2_op
+#else
+# define FPGA_VIRTEX2_OPS	NULL
+#endif
+
 /* Device Image Sizes (in bytes)
  *********************************************************************/
 #define XILINX_XC2V40_SIZE		(338208 / 8)
@@ -58,39 +63,51 @@
 /* Descriptor Macros
  *********************************************************************/
 #define XILINX_XC2V40_DESC(iface, fn_table, cookie)	\
-{ xilinx_virtex2, iface, XILINX_XC2V40_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V40_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V80_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V80_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V80_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V250_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V250_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V250_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V500_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V500_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V500_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V1000_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V1000_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V1000_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V1500_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V1500_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V1500_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V2000_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V2000_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V2000_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V3000_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V3000_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V3000_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V4000_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V4000_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V4000_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V6000_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V6000_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V6000_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V8000_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V8000_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V8000_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #define XILINX_XC2V10000_DESC(iface, fn_table, cookie) \
-{ xilinx_virtex2, iface, XILINX_XC2V10000_SIZE, fn_table, cookie, &virtex2_op }
+{ xilinx_virtex2, iface, XILINX_XC2V10000_SIZE, fn_table, cookie, \
+	FPGA_VIRTEX2_OPS }
 
 #endif /* _VIRTEX2_H_ */