Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/m68k/include/asm/bootstd.h b/arch/m68k/include/asm/bootstd.h
index bdc1a4a..e518f5a 100644
--- a/arch/m68k/include/asm/bootstd.h
+++ b/arch/m68k/include/asm/bootstd.h
@@ -31,7 +31,7 @@
 #define __BN_flash_write_range		20
 
 /* Calling conventions compatible to (uC)linux/68k
- * We use simmilar macros to call into the bootloader as for uClinux
+ * We use similar macros to call into the bootloader as for uClinux
  */
 
 #define __bsc_return(type, res) \