MIPS: ralink: rename gpio_pinmux to rt_gpio_pinmux

Add proper namespacing to the variable.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5171/
diff --git a/arch/mips/ralink/common.h b/arch/mips/ralink/common.h
index 3009903..f4b19c6 100644
--- a/arch/mips/ralink/common.h
+++ b/arch/mips/ralink/common.h
@@ -24,7 +24,7 @@
 	int uart_shift;
 	void (*wdt_reset)(void);
 };
-extern struct ralink_pinmux gpio_pinmux;
+extern struct ralink_pinmux rt_gpio_pinmux;
 
 struct ralink_soc_info {
 	unsigned char sys_type[RAMIPS_SYS_TYPE_LEN];