brcm47xx: add gpio_request_one()

This fixes a compile error with kernel 3.3.

SVN-Revision: 31635

target/linux/brcm47xx/patches-3.3/220-add_gpio_request_one.patch

@@ -0,0 +1,51 @@
+--- a/arch/mips/bcm47xx/gpio.c
++++ b/arch/mips/bcm47xx/gpio.c
+@@ -7,6 +7,7 @@
+  */
+ 
+ #include <linux/export.h>
++#include <linux/gpio.h>
+ #include <linux/ssb/ssb.h>
+ #include <linux/ssb/ssb_driver_chipcommon.h>
+ #include <linux/ssb/ssb_driver_extif.h>
+@@ -100,3 +101,30 @@ int gpio_to_irq(unsigned gpio)
+ 	return -EINVAL;
+ }
+ EXPORT_SYMBOL_GPL(gpio_to_irq);
++
++/**
++ * gpio_request_one - request a single GPIO with initial configuration
++ * @gpio:	the GPIO number
++ * @flags:	GPIO configuration as specified by GPIOF_*
++ * @label:	a literal description string of this GPIO
++ */
++int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
++{
++	int err;
++
++	err = gpio_request(gpio, label);
++	if (err)
++		return err;
++
++	if (flags & GPIOF_DIR_IN)
++		err = gpio_direction_input(gpio);
++	else
++		err = gpio_direction_output(gpio,
++				(flags & GPIOF_INIT_HIGH) ? 1 : 0);
++
++	if (err)
++		gpio_free(gpio);
++
++	return err;
++}
++EXPORT_SYMBOL_GPL(gpio_request_one);
+--- a/arch/mips/include/asm/mach-bcm47xx/gpio.h
++++ b/arch/mips/include/asm/mach-bcm47xx/gpio.h
+@@ -19,6 +19,7 @@
+ extern int gpio_request(unsigned gpio, const char *label);
+ extern void gpio_free(unsigned gpio);
+ extern int gpio_to_irq(unsigned gpio);
++extern int gpio_request_one(unsigned gpio, unsigned long flags, const char *label);
+ 
+ static inline int gpio_get_value(unsigned gpio)
+ {