serial: omap: fix compile breakage

when rebasing patches on top of Greg's tty-next,
it looks like automerge broke a few things which
I didn't catch (for whatever reason I didn't
have OMAP Serial enabled on .config) so I ended
up breaking the build on Greg's tty-next branch.

Fix the breakage by re-adding the three missing
members on struct uart_omap_port.
Reported-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm/plat-omap/include/plat/omap-serial.h

@@ -105,8 +105,4 @@ struct uart_omap_dma {
 	unsigned int		rx_timeout;
 };
 
-
-	int			DTR_gpio;
-	int			DTR_inverted;
-	int			DTR_active;
 #endif /* __OMAP_SERIAL_H__ */

drivers/tty/serial/omap-serial.c

@@ -100,6 +100,10 @@ struct uart_omap_port {
 	u8			wakeups_enabled;
 	unsigned int		irq_pending:1;
 
+	int			DTR_gpio;
+	int			DTR_inverted;
+	int			DTR_active;
+
 	struct pm_qos_request	pm_qos_request;
 	u32			latency;
 	u32			calc_latency;