fpga: spartan2: Avoid CamelCase

No functional changes.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/esd/pmc440/fpga.c b/board/esd/pmc440/fpga.c
index b7b62dd..cef2050 100644
--- a/board/esd/pmc440/fpga.c
+++ b/board/esd/pmc440/fpga.c
@@ -47,7 +47,7 @@
 };
 #endif
 
-Xilinx_Spartan2_Slave_Serial_fns ngcc_fpga_fns = {
+xilinx_spartan2_slave_serial_fns ngcc_fpga_fns = {
 	ngcc_fpga_pre_config_fn,
 	ngcc_fpga_pgm_fn,
 	ngcc_fpga_clk_fn,