platform/x86: Typo fix in the file classmate-laptop.c

s/derefence/dereference/

Signed-off-by: Bhaskar Chowdhury <[e-mail]>
Acked-by: Thadeu Lima de Souza Cascardo <[e-mail]>
Acked-by: Randy Dunlap <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Hans de Goede <[e-mail]>

drivers/platform/x86/classmate-laptop.c

···
 	/*
 	 * If RFKILL is disabled, rfkill_alloc will return ERR_PTR(-ENODEV).
 	 * This is OK, however, since all other uses of the device will not
-	 * derefence it.
+	 * dereference it.
 	 */
 	if (ipml->rf) {
 		retval = rfkill_register(ipml->rf);