imx8m: clean-up kconfig indentation

Replace spurious spaces with proper tabs.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
index 41088a2..a210ce7 100644
--- a/arch/arm/mach-imx/imx8m/Kconfig
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -25,14 +25,14 @@
 	default "imx8m"
 
 choice
-	prompt  "NXP i.MX8M board select"
+	prompt "NXP i.MX8M board select"
 	optional
 
 config TARGET_IMX8MQ_CM
-        bool "Ronetix iMX8MQ-CM SoM"
+	bool "Ronetix iMX8MQ-CM SoM"
 		select BINMAN
-        select IMX8MQ
-        select IMX8M_LPDDR4
+	select IMX8MQ
+	select IMX8M_LPDDR4
 
 config TARGET_IMX8MQ_EVK
 	bool "imx8mq_evk"
@@ -109,10 +109,10 @@
 	select IMX8M_LPDDR4
 
 config TARGET_VERDIN_IMX8MM
-       bool "Support Toradex Verdin iMX8M Mini module"
-       select IMX8MM
-       select SUPPORT_SPL
-       select IMX8M_LPDDR4
+	bool "Support Toradex Verdin iMX8M Mini module"
+	select IMX8MM
+	select SUPPORT_SPL
+	select IMX8M_LPDDR4
 
 config TARGET_IMX8MM_BEACON
 	bool "imx8mm Beacon Embedded devkit"
@@ -129,14 +129,14 @@
 config TARGET_PHYCORE_IMX8MM
 	bool "PHYTEC PHYCORE i.MX8MM"
 	select IMX8MM
-        select SUPPORT_SPL
+	select SUPPORT_SPL
 	select IMX8M_LPDDR4
 
 config TARGET_PHYCORE_IMX8MP
 	bool "PHYTEC PHYCORE i.MX8MP"
 	select BINMAN
 	select IMX8MP
-        select SUPPORT_SPL
+	select SUPPORT_SPL
 	select IMX8M_LPDDR4
 
 config TARGET_IMX8MM_CL_IOT_GATE