ARM: imx: Kconfig: Fix typo in help

Fix typo from i.MX31 to i.MX35 in i.MX35's help.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/mach-imx/Kconfig

@@ -63,7 +63,7 @@ config SOC_IMX35
 	select MXC_AVIC
 	select PINCTRL_IMX35
 	help
-	  This enables support for Freescale i.MX31 processor
+	  This enables support for Freescale i.MX35 processor
 
 endif