configs: iocon: Enabling CONFIG_CMD_FPGAD again

configs: iocon: Enabling CONFIG_CMD_FPGAD again

This is a MIME GnuPG-signed message.  If you see this text, it means that
your E-mail or Usenet software does not support MIME signed messages.
The Internet standard for MIME PGP messages, RFC 2015, was published in 1996.
To open this message correctly you will need to install E-mail or Usenet
software that supports modern Internet standards.

Revert changes in iocon.h config file caused by
these two commits:
"configs: iocom: Fix typo on CMD_FPGA command"
(sha1: d0db28f94034ef02c1d6737895766fb3c19de47f)
and
"fpga: Guard the LOADMK functionality with CMD_FPGA_LOADMK"
(sha1: 64e809afeaf1572c3246a5bca198a77d0498fd89)

CONFIG_CMD_FPGAD is own command.

Reported-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>