cpu/intel/haswell/Kconfig: Intend help text with two spaces

Commit »haswell: 24MHz monotonic time implementation« (c46cc6f1) [1]
added the Kconfig variable `MONOTONIC_TIMER_MSR` with a help text,
but only used one space instead of the suggested two spaces for
indentation. So add one space.

»Lines under a "config" definition are indented with one tab, while
help text is indented an additional two spaces.« [2]

[1] http://review.coreboot.org/3153
[2] https://www.kernel.org/doc/Documentation/CodingStyle
    (Chapter 10: Kconfig configuration files)

Change-Id: I39cf356bfd54c66a2f1b837c6667dcc915e41f29
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/3262
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/cpu/intel/haswell/Kconfig

@@ -61,6 +61,6 @@ config MONOTONIC_TIMER_MSR
 	depends on INTEL_LYNXPOINT_LP
 	select HAVE_MONOTONIC_TIMER
 	help
-	 Provide a monotonic timer using the 24MHz MSR counter.
+	  Provide a monotonic timer using the 24MHz MSR counter.
 
 endif