fpga: xilinx: Avoid CamelCase for in Xilinx_desc

No functional changes.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/balloon3/balloon3.c b/board/balloon3/balloon3.c
index 4aa6605..aa108ca 100644
--- a/board/balloon3/balloon3.c
+++ b/board/balloon3/balloon3.c
@@ -207,7 +207,7 @@
 	fpga_post_config_fn,
 };
 
-Xilinx_desc fpga = XILINX_XC3S1000_DESC(slave_parallel,
+xilinx_desc fpga = XILINX_XC3S1000_DESC(slave_parallel,
 			(void *)&balloon3_fpga_fns, 0);
 
 /* Initialize the FPGA */