Config.in files: whitespace cleanup

This patch fixes the following whitespace problems in Config.in files:
- trailing whitespace
- spaces instead of tabs for indentation
- help text not indented with tab + 2 spaces

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

boot/at91dataflashboot/Config.in

@@ -1,3 +1,3 @@
 config BR2_TARGET_AT91DATAFLASHBOOT
-       depends on BR2_arm926t
-       bool "AT91 DataFlashBoot"
+	depends on BR2_arm926t
+	bool "AT91 DataFlashBoot"

boot/mxs-bootlets/Config.in

@@ -43,16 +43,16 @@ choice
 	  Select which bootstream to generate
 
 config BR2_TARGET_MXS_BOOTLETS_BAREBOX
-       depends on BR2_TARGET_BAREBOX
-       bool "Barebox Bootloader"
+	depends on BR2_TARGET_BAREBOX
+	bool "Barebox Bootloader"
 
 config BR2_TARGET_MXS_BOOTLETS_LINUX
-       depends on BR2_LINUX_KERNEL
-       bool "Linux Kernel"
+	depends on BR2_LINUX_KERNEL
+	bool "Linux Kernel"
 
 config BR2_TARGET_MXS_BOOTLETS_UBOOT
-       depends on BR2_TARGET_UBOOT
-       bool "U-boot bootloader"
+	depends on BR2_TARGET_UBOOT
+	bool "U-boot bootloader"
 
 endchoice
 
@@ -82,9 +82,9 @@ config BR2_TARGET_MXS_BOOTLETS_CUSTOM_BOARD
 endchoice
 
 config BR2_TARGET_MXS_BOOTLETS_CUSTOM_BOARD_NAME
-       string "Custom board name"
-       depends on BR2_TARGET_MXS_BOOTLETS_CUSTOM_BOARD
-       help
-         Name of the board to build the bootlets for
+	string "Custom board name"
+	depends on BR2_TARGET_MXS_BOOTLETS_CUSTOM_BOARD
+	help
+	  Name of the board to build the bootlets for
 
 endif

boot/uboot/Config.in

@@ -21,7 +21,7 @@ config BR2_TARGET_UBOOT_LATEST_VERSION
 	bool "2013.10"
 
 config BR2_TARGET_UBOOT_CUSTOM_VERSION
-       bool "Custom version"
+	bool "Custom version"
 	help
 	  This option allows to use a specific official versions