`CF_CFDP_ProcessPollingDirectories()` can be simplified

[thnkslprpt]

Checklist

• I reviewed the Contributing Guide.
• I performed a cursory search to see if the bug report is relevant, not redundant, nor in conflict with other tickets.

Describe the bug
count_check and ret are only used once, so they are unnecessary and can be removed.
chan_index and cc don't seem to get updated so can be initialized once instead of in every run through the loop.

Code snips

CF/fsw/src/cf_cfdp.c

Lines 1480 to 1541 in ba12bc1

	void CF_CFDP_ProcessPollingDirectories(CF_Channel_t *chan)
	{
	CF_Poll_t * poll;
	CF_ChannelConfig_t *cc;
	CF_PollDir_t * pd;
	int i;
	int chan_index;
	int count_check;
	int ret;
	for (i = 0; i < CF_MAX_POLLING_DIR_PER_CHAN; ++i)
	{
	poll = &chan->poll[i];
	chan_index = (chan - CF_AppData.engine.channels);
	cc = &CF_AppData.config_table->chan[chan_index];
	pd = &cc->polldir[i];
	count_check = 0;
	if (pd->enabled)
	{
	if (!poll->pb.busy && !poll->pb.num_ts)
	{
	if (!poll->timer_set && pd->interval_sec)
	{
	/* timer was not set, so set it now */
	CF_Timer_InitRelSec(&poll->interval_timer, pd->interval_sec);
	poll->timer_set = 1;
	}
	else if (CF_Timer_Expired(&poll->interval_timer))
	{
	/* the timer has expired */
	ret = CF_CFDP_PlaybackDir_Initiate(&poll->pb, pd->src_dir, pd->dst_dir, pd->cfdp_class, 0,
	chan_index, pd->priority, pd->dest_eid);
	if (!ret)
	{
	poll->timer_set = 0;
	}
	else
	{
	/* error occurred in playback directory, so reset the timer */
	/* an event is sent in CF_CFDP_PlaybackDir_Initiate so there is no reason to
	* to have another here */
	CF_Timer_InitRelSec(&poll->interval_timer, pd->interval_sec);
	}
	}
	else
	{
	CF_Timer_Tick(&poll->interval_timer);
	}
	}
	else
	{
	/* playback is active, so step it */
	CF_CFDP_ProcessPlaybackDirectory(chan, &poll->pb);
	}
	count_check = 1;
	}
	CF_CFDP_UpdatePollPbCounted(&poll->pb, count_check, &CF_AppData.hk.Payload.channel_hk[chan_index].poll_counter);
	}
	}

Expected behavior
Simplify where possible to improve clarify and ease future maintenance.

Reporter Info
Avi Weiss   @thnkslprpt