staging: most: simplify expression

This patch replaces the ternary ?-operator with a way simpler subtraction.
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/most/aim-cdev/cdev.c

@@ -254,7 +254,7 @@ aim_read(struct file *filp, char __user *buf, size_t count, loff_t *offset)
 				  mbo->virt_address + channel->mbo_offs,
 				  to_copy);
 
-	copied = not_copied ? to_copy - not_copied : to_copy;
+	copied = to_copy - not_copied;
 
 	if (count < mbo->processed_length) {
 		channel->mbo_offs = copied;