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>