omap_hdq: fix usecount handling

hdq_usecount was set to zero after a successful read, so
omap_hdq_put could not properly free resources which leads
e.g. to increasing usecounts in lsmod output
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Reviewed-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/w1/masters/omap_hdq.c

@@ -618,7 +618,6 @@ static u8 omap_w1_read_byte(void *_hdq)
 
 	hdq_disable_interrupt(hdq_data, OMAP_HDQ_CTRL_STATUS,
 			      ~OMAP_HDQ_CTRL_STATUS_INTERRUPTMASK);
-	hdq_data->hdq_usecount = 0;
 
 	/* Write followed by a read, release the module */
 	if (hdq_data->init_trans) {