mtd: onenand: Fix Kconfig indentation

Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
	$ sed -e 's/^        /\t/' -i */Kconfig
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/mtd/nand/onenand/Kconfig

@@ -33,12 +33,12 @@ config MTD_ONENAND_OMAP2
 	  Enable dmaengine and gpiolib for better performance.
 
 config MTD_ONENAND_SAMSUNG
-        tristate "OneNAND on Samsung SOC controller support"
-        depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS4
-        help
-          Support for a OneNAND flash device connected to an Samsung SOC.
-          S3C64XX uses command mapping method.
-          S5PC110/S5PC210 use generic OneNAND method.
+	tristate "OneNAND on Samsung SOC controller support"
+	depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS4
+	help
+	  Support for a OneNAND flash device connected to an Samsung SOC.
+	  S3C64XX uses command mapping method.
+	  S5PC110/S5PC210 use generic OneNAND method.
 
 config MTD_ONENAND_OTP
 	bool "OneNAND OTP Support"