Fix typos via codespell

atleast -> at least
encouter -> encounter

examples/chardev2.c

@@ -196,7 +196,7 @@ static struct file_operations fops = {
 /* Initialize the module - Register the character device */
 static int __init chardev2_init(void)
 {
-    /* Register the character device (atleast try) */
+    /* Register the character device (at least try) */
     int ret_val = register_chrdev(MAJOR_NUM, DEVICE_NAME, &fops);
 
     /* Negative values signify an error */

lkmpg.tex

@@ -1905,7 +1905,7 @@ How many IRQs there are is hardware-dependent.
 
 The flags can be used for specify behaviors of the IRQ.
 For example, use \cpp|IRQF_SHARED| to indicate you are willing to share the IRQ with other interrupt handlers (usually because a number of hardware devices sit on the same IRQ); use the \cpp|IRQF_ONESHOT| to indicate that the IRQ is not reenabled after the handler finished.
-It should be noted that in some materials, you may encouter another set of IRQ flags named with the \cpp|SA| prefix.
+It should be noted that in some materials, you may encounter another set of IRQ flags named with the \cpp|SA| prefix.
 For example, the \cpp|SA_SHIRQ| and the \cpp|SA_INTERRUPT|.
 Those are the the IRQ flags in the older kernels.
 They have been removed completely.