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/m523xsim.h b/arch/m68k/include/asm/m523xsim.h
index 8996df6..6235921 100644
--- a/arch/m68k/include/asm/m523xsim.h
+++ b/arch/m68k/include/asm/m523xsim.h
@@ -48,7 +48,7 @@
 #define	MCFSIM_DMR1		(MCF_IPSBAR + 0x54)	/* Address mask 1 */
 
 /*
- *  Reset Controll Unit (relative to IPSBAR).
+ *  Reset Control Unit (relative to IPSBAR).
  */
 #define	MCF_RCR			0x110000
 #define	MCF_RSR			0x110001