mx35 iomux: correct input select register index

Prior to this fix, calls to mxc_iomux_set_input() for registers
after MUX_IN_GPIO2_IN_19 would write to the wrong registers,
possibly resulting in unexpected behaviour.

Signed-off-by: Philip Paeps <philip@paeps.cx>

arch/arm/include/asm/arch-mx35/iomux.h

@@ -141,6 +141,7 @@ typedef enum iomux_input_select {
 	MUX_IN_GPIO2_IN_17,
 	MUX_IN_GPIO2_IN_18,
 	MUX_IN_GPIO2_IN_19,
+	MUX_IN_GPIO2_IN_1,
 	MUX_IN_GPIO2_IN_20,
 	MUX_IN_GPIO2_IN_21,
 	MUX_IN_GPIO2_IN_22,