Patch for ess_2.6-v0.6 for kernel 2.6.38

[doug Springer <gpib@xxxxxxxxxxxxxxxx>]

This allows this driver to build on 2.6.38.

Cheers.

diff -ru ess_2.6-v0.6/linmodem-2.6.c ess_2.6-v0.6-2.6.38/linmodem-2.6.c
--- ess_2.6-v0.6/linmodem-2.6.c	2010-04-26 21:32:32.000000000 -0600
+++ ess_2.6-v0.6-2.6.38/linmodem-2.6.c	2011-09-14 18:31:29.000000000 -0600
@@ -34,6 +34,7 @@
 #include <linux/tty_flip.h>
 #include <linux/serial_reg.h>
 #include <linux/serial.h>
+#include <linux/slab.h>
 
 #include "linmodem-2.6.h"
 
@@ -77,7 +78,7 @@
 
 
 
-static DECLARE_MUTEX(linmodem_sem);
+static DEFINE_SEMAPHORE(linmodem_sem);
 
 struct linmodem_port_list {
 	struct list_head     list;
@@ -1191,7 +1192,7 @@
  * 16x50 serial ports to be configured at run-time, to support PCMCIA
  * modems and PCI multiport cards.
  */
-static DECLARE_MUTEX(serial_sem);
+static DEFINE_SEMAPHORE(serial_sem);