Kconfig: Replace spaces with tabs and missing newline

Trivial Kconfig cleanup. Use tabs instead of spaces and every Kconfig
entry should be separated by newline.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>

cmd/Kconfig

@@ -1012,6 +1012,7 @@ config CMD_USB_SDP
 	help
 	  Enables the command "sdp" which is used to have U-Boot emulating the
 	  Serial Download Protocol (SDP) via USB.
+
 config CMD_ROCKUSB
 	bool "rockusb"
 	depends on USB_FUNCTION_ROCKUSB