trivial: fix then -> than typos in comments and documentation

- (better, more, bigger ...) then -> (...) than

Signed-off-by: Frederik Schwarzer <schwarzerf@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index c825bde..fb87c08 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -303,7 +303,7 @@
 	  correct rounding, the emulator can (often) do the same but this
 	  extra calculation can cost quite some time, so you can disable
 	  it here. The emulator will then "only" calculate with a 64 bit
-	  mantissa and round slightly incorrect, what is more then enough
+	  mantissa and round slightly incorrect, what is more than enough
 	  for normal usage.
 
 config M68KFPU_EMU_ONLY