mx6: Adjust the GPR offset for mx6solox

On mx6solox there is an additional 0x4000 offset for the GPR registers.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>

arch/arm/include/asm/arch-mx6/imx-regs.h

@@ -398,6 +398,9 @@ struct src {
 
 
 struct iomuxc {
+#ifdef CONFIG_MX6SX
+	u8 reserved[0x4000];
+#endif
 	u32 gpr[14];
 	u32 omux[5];
 	/* mux and pad registers */