src/Kconfig: Indent with tabs instead of spaces

Change-Id: I47776d842b8d684fc11ac448b751892ee2bc5ecc
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/13116
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/Kconfig

@@ -287,8 +287,8 @@ config BOOTBLOCK_SOURCE
 # To be selected by arch or platform if a C environment is available during the
 # bootblock. Normally this signifies availability of RW memory (e.g. SRAM).
 config C_ENVIRONMENT_BOOTBLOCK
-       bool
-       default n
+	bool
+	default n
 
 config SKIP_MAX_REBOOT_CNT_CLEAR
 	bool "Do not clear reboot count after successful boot"