Gemini: gpiolib based GPIO support v2

v2:
- update copyrights

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
diff --git a/arch/arm/mach-gemini/common.h b/arch/arm/mach-gemini/common.h
index 9c1afa1..9392834 100644
--- a/arch/arm/mach-gemini/common.h
+++ b/arch/arm/mach-gemini/common.h
@@ -17,6 +17,7 @@
 extern void gemini_map_io(void);
 extern void gemini_init_irq(void);
 extern void gemini_timer_init(void);
+extern void gemini_gpio_init(void);
 
 /* Common platform devices registration functions */
 extern int platform_register_uart(void);