omap: mux: Allow compiling in new mux code on all mach-omap2 systems

Allow compiling in new mux code on all mach-omap2 systems

Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/mux.h b/arch/arm/mach-omap2/mux.h
index 46315f2..937a8ca 100644
--- a/arch/arm/mach-omap2/mux.h
+++ b/arch/arm/mach-omap2/mux.h
@@ -104,7 +104,7 @@
 	u16	value;
 };
 
-#if defined(CONFIG_OMAP_MUX) && defined(CONFIG_ARCH_OMAP3)
+#if defined(CONFIG_OMAP_MUX)
 
 /**
  * omap_mux_init_gpio - initialize a signal based on the GPIO number