cmd: fpga: Move fpga_loadbitstream to fpga.c

In bitstream decoding you can directly check device
which you want to load and in fpga.c are fpga_validate
and fpga_dev_info functions which should be used for it.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@ti.com>

drivers/fpga/fpga.c

@@ -187,6 +187,15 @@ int fpga_add(fpga_type devtype, void *desc)
 	return devnum;
 }
 
+/*
+ * Convert bitstream data and load into the fpga
+ */
+int __weak fpga_loadbitstream(unsigned long dev, char *fpgadata, size_t size)
+{
+	printf("Bitstream support not implemented for this FPGA device\n");
+	return FPGA_FAIL;
+}
+
 /*
  * Generic multiplexing code
  */