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/macintosh.h b/arch/m68k/include/asm/macintosh.h
index 50db359..c2a1c5e 100644
--- a/arch/m68k/include/asm/macintosh.h
+++ b/arch/m68k/include/asm/macintosh.h
@@ -14,7 +14,7 @@
 extern int mac_irq_pending(unsigned int);
 
 /*
- *	Floppy driver magic hook - probably shouldnt be here
+ *	Floppy driver magic hook - probably shouldn't be here
  */
 
 extern void via1_set_head(int);