davinci: DM365: Allow use of GPIO64_57

Extended the MUX configuration to allow use of GPIO
terminals 64..57.

Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
diff --git a/arch/arm/mach-davinci/include/mach/mux.h b/arch/arm/mach-davinci/include/mach/mux.h
index 8638903..923debe 100644
--- a/arch/arm/mach-davinci/include/mach/mux.h
+++ b/arch/arm/mach-davinci/include/mach/mux.h
@@ -291,6 +291,7 @@
 	DM365_GPIO20,
 	DM365_GPIO33,
 	DM365_GPIO40,
+	DM365_GPIO64_57,
 
 	/* Video */
 	DM365_VOUT_FIELD,