fpga: spartan2: Avoid CamelCase

No functional changes.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/matrix_vision/mvsmr/fpga.c b/board/matrix_vision/mvsmr/fpga.c
index 88035a9..639bc7c 100644
--- a/board/matrix_vision/mvsmr/fpga.c
+++ b/board/matrix_vision/mvsmr/fpga.c
@@ -27,7 +27,7 @@
 };
 
 Xilinx_desc spartan3 = {
-	Xilinx_Spartan2,
+	xilinx_spartan2,
 	slave_serial,
 	XILINX_XC3S200_SIZE,
 	(void *) &fpga_fns,