pinctrl: fix pxa2xx.c build warnings

Add #include of <linux/pinctrl/machine.h> to fix build
warnings in pinctrl-pxa2xx.c.  Fixes these warnings:

In file included from ../drivers/pinctrl/pxa/pinctrl-pxa2xx.c:24:0:
../drivers/pinctrl/pxa/../pinctrl-utils.h:36:8: warning: `enum pinctrl_map_type' declared inside parameter list [enabled by default]
   enum pinctrl_map_type type);
        ^
../drivers/pinctrl/pxa/../pinctrl-utils.h:36:8: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Randy Dunlap <[email protected]>
Cc: Robert Jarzmik <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

drivers/pinctrl/pxa/pinctrl-pxa2xx.c

@@ -10,6 +10,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/module.h>
+#include <linux/pinctrl/machine.h>
 #include <linux/pinctrl/pinconf.h>
 #include <linux/pinctrl/pinconf-generic.h>
 #include <linux/pinctrl/pinmux.h>