Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>

arch/score/Makefile

diff --git a/arch/score/Makefile b/arch/score/Makefile
index d77dc63..974aefe 100644
--- a/arch/score/Makefile
+++ b/arch/score/Makefile
@@ -40,5 +40,5 @@
 define archhelp
 	echo '  vmlinux.bin          - Raw binary boot image'
 	echo
-	echo '  These will be default as apropriate for a configured platform.'
+	echo '  These will be default as appropriate for a configured platform.'
 endef