ARM: imx: Kconfig: Fix indentation

The convention for indentation seems to be a single tab. Help text is
further indented by an additional two whitespaces. Fix the lines that
violate these rules.

While at it, replace separator tabs with whitespaces.

Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/mach-imx/Kconfig

@@ -96,7 +96,7 @@ config SOC_IMX5
 	select HAVE_IMX_SRC
 	select MXC_TZIC
 
-config	SOC_IMX50
+config SOC_IMX50
 	bool "i.MX50 support"
 	select PINCTRL_IMX50
 	select SOC_IMX5
@@ -111,7 +111,7 @@ config SOC_IMX51
 	help
 	  This enables support for Freescale i.MX51 processor
 
-config	SOC_IMX53
+config SOC_IMX53
 	bool "i.MX53 support"
 	select PINCTRL_IMX53
 	select SOC_IMX5
@@ -216,7 +216,7 @@ config SOC_IMX7D
 	select SOC_IMX7D_CM4 if ARM_SINGLE_ARMV7M
 	select ARM_ERRATA_814220 if ARCH_MULTI_V7
 	help
-		This enables support for Freescale i.MX7 Dual processor.
+	  This enables support for Freescale i.MX7 Dual processor.
 
 config SOC_IMX7ULP
 	bool "i.MX7ULP support"