samples: net: irc_bot: make some functions more accessible

Due to code restructuring we should move the following
functions higher in the code (above zirc_connect):
zirc_nick_set()
zirc_user_set()
zirc_chan_join()

Also relocate the function declaration for on_msg_rcvd()
to the top of the code.

Change-Id: I3936fb645b709dcbcfcc4212c127db819974c046
Signed-off-by: Michael Scott <michael.scott@linaro.org>
1 file changed