Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5b9f78b..fdc9d4d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -694,7 +694,7 @@
 	  the Samsung SMDK2410 development board (and derivatives).
 
 	  Note, the S3C2416 and the S3C2450 are so close that they even share
-	  the same SoC ID code. This means that there is no seperate machine
+	  the same SoC ID code. This means that there is no separate machine
 	  directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 
 config ARCH_S3C64XX