MAINTAINERS: Replace IRC by DISCORD
MAINTAINERS: Replace IRC by DISCORD

Discord is becoming the chat server of choice.

Signed-off-by: Tom Joseph <b9c6330b74e9240496e23e0ead41648ed4172ac7@gmail.com>
Change-Id: I38b9d0842d91647cb98759a1756c4afeda66ca00

openbmc/openpower-host-ipmi-oem,openbmc/openpower-host-ipmi-oem,openbmc/openpower-host-ipmi-oem