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/mcftimer.h b/arch/m68k/include/asm/mcftimer.h
index 92b276f..351c272 100644
--- a/arch/m68k/include/asm/mcftimer.h
+++ b/arch/m68k/include/asm/mcftimer.h
@@ -27,7 +27,7 @@
 
 /*
  *	Bit definitions for the Timer Mode Register (TMR).
- *	Register bit flags are common accross ColdFires.
+ *	Register bit flags are common across ColdFires.
  */
 #define	MCFTIMER_TMR_PREMASK	0xff00		/* Prescalar mask */
 #define	MCFTIMER_TMR_DISCE	0x0000		/* Disable capture */