drivers: fpga: zynqpl: fix compilation with SPL

Disable the use of function zynq_loadfs when compiling
the driver for the SPL, as the following filesystem
functions are not found by the linker:
- fs_set_blk_dev
- fs_read
- fs_set_blk_dev
- fs_read
- fs_read

Signed-off-by: Luis Araneda <luaraneda@gmail.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

drivers/fpga/zynqpl.c

@@ -411,7 +411,7 @@ static int zynq_load(xilinx_desc *desc, const void *buf, size_t bsize,
 	return FPGA_SUCCESS;
 }
 
-#if defined(CONFIG_CMD_FPGA_LOADFS)
+#if defined(CONFIG_CMD_FPGA_LOADFS) && !defined(CONFIG_SPL_BUILD)
 static int zynq_loadfs(xilinx_desc *desc, const void *buf, size_t bsize,
 		       fpga_fs_info *fsinfo)
 {
@@ -494,7 +494,7 @@ static int zynq_loadfs(xilinx_desc *desc, const void *buf, size_t bsize,
 
 struct xilinx_fpga_op zynq_op = {
 	.load = zynq_load,
-#if defined(CONFIG_CMD_FPGA_LOADFS)
+#if defined(CONFIG_CMD_FPGA_LOADFS) && !defined(CONFIG_SPL_BUILD)
 	.loadfs = zynq_loadfs,
 #endif
 };