ARM: ixp4xx: fix typos in comments

Various spelling mistakes in comments.
Detected with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220318103729.157574-26-Julia.Lawall@inria.fr
Link: https://lore.kernel.org/r/20220826112153.438829-1-linus.walleij@linaro.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-ixp4xx/ixp4xx-of.c

@@ -46,7 +46,7 @@ static void __init ixp4xx_of_map_io(void)
 }
 
 /*
- * We handle 4 differen SoC families. These compatible strings are enough
+ * We handle 4 different SoC families. These compatible strings are enough
  * to provide the core so that different boards can add their more detailed
  * specifics.
  */