Kconfig: Use spaces not tabs in Kconfig entires

While the Kconfig language seems to accept either form of whitespace, we
use a space throughout the project, except in these spots.
Signed-off-by: NTom Rini <trini@konsulko.com>

arch/arm/mach-exynos/Kconfig

@@ -141,7 +141,7 @@ if ARCH_EXYNOS7
 choice
 	prompt "EXYNOS7 board select"
 
-config  TARGET_ESPRESSO7420
+config TARGET_ESPRESSO7420
 	bool "ESPRESSO7420 board"
 	select ARM64
 	select ARMV8_MULTIENTRY

board/freescale/mx6memcal/Kconfig

@@ -87,12 +87,12 @@ choice
 	help
 	  Select the type of DDR (DDR3 or LPDDR2) used on your design
 
-config	DDR3
+config DDR3
 	bool "DDR3"
 	help
 	  Select this if your board design uses DDR3.
 
-config	LPDDR2
+config LPDDR2
 	bool "LPDDR2"
 	help
 	  Select this if your board design uses LPDDR2.