Convert CONFIG_CMD_FPGA_LOADBP et al to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_FPGA_LOADBP
   CONFIG_CMD_FPGA_LOADFS
   CONFIG_CMD_FPGA_LOADMK
   CONFIG_CMD_FPGA_LOADP

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 99e42e4..16cf961 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -593,6 +593,32 @@
 	help
 	  FPGA support.
 
+config CMD_FPGA_LOADBP
+	bool "fpga loadbp - load partial bitstream (Xilinx only)"
+	depends on CMD_FPGA
+	help
+	  Supports loading an FPGA device from a bitstream buffer containing
+	  a partial bitstream.
+
+config CMD_FPGA_LOADFS
+	bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)"
+	depends on CMD_FPGA
+	help
+	  Supports loading an FPGA device from a FAT filesystem.
+
+config CMD_FPGA_LOADMK
+	bool "fpga loadmk - load bitstream from image"
+	depends on CMD_FPGA
+	help
+	  Supports loading an FPGA device from a image generated by mkimage.
+
+config CMD_FPGA_LOADP
+	bool "fpga loadp - load partial bitstream"
+	depends on CMD_FPGA
+	help
+	  Supports loading an FPGA device from a bitstream buffer containing
+	  a partial bitstream.
+
 config CMD_FPGAD
 	bool "fpgad - dump FPGA registers"
 	help