score: Fix typo in Kconfig.debug

Correct spelling "debuging" to "debugging" in
arch/score/Kconfig.debug

Signed-off-by: Masanari Iida <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

arch/score/Kconfig.debug

···
 	help
 	  If you say Y here, some debugging macros will do run-time checking.
 	  If you say N here, those macros will mostly turn to no-ops.  See
-	  include/asm-score/debug.h for debuging macros.
+	  include/asm-score/debug.h for debugging macros.
 	  If unsure, say N.
 
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