treewide: Fix typo in printk and comments

Fix typo in printk and comments within various drivers.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 5a93698..15d37af 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -613,7 +613,7 @@
 
 		if (hsr_ec >= ARRAY_SIZE(arm_exit_handlers)
 		    || !arm_exit_handlers[hsr_ec]) {
-			kvm_err("Unkown exception class: %#08lx, "
+			kvm_err("Unknown exception class: %#08lx, "
 				"hsr: %#08x\n", hsr_ec,
 				(unsigned int)vcpu->arch.hsr);
 			BUG();