TTY: simserial no longer needs serialP

Let's do a spin-off of serial_state structure with only needed
elements.

And remove serialP crap from includes.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index 3698a2f..120aad4 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -27,10 +27,10 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/capability.h>
+#include <linux/circ_buf.h>
 #include <linux/console.h>
 #include <linux/module.h>
 #include <linux/serial.h>
-#include <linux/serialP.h>
 #include <linux/sysrq.h>
 
 #include <asm/irq.h>
@@ -46,6 +46,13 @@
 
 #define NR_PORTS	1	/* only one port for now */
 
+struct serial_state {
+	struct tty_port tport;
+	struct circ_buf xmit;
+	int irq;
+	int x_char;
+};
+
 static char *serial_name = "SimSerial driver";
 static char *serial_version = "0.6";