Fix up trivial spelling errors ('taht' -> 'that')

Pointed out by Lucas who found the new one in a comment in
setup_percpu.c. And then I fixed the others that I grepped
for.

Reported-by: Lucas <canolucas@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 690c2c0..a60df9a 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -239,7 +239,7 @@
 		per_cpu(x86_cpu_to_node_map, cpu) =
 			early_per_cpu_map(x86_cpu_to_node_map, cpu);
 		/*
-		 * Ensure taht the boot cpu numa_node is correct when the boot
+		 * Ensure that the boot cpu numa_node is correct when the boot
 		 * cpu is on a node that doesn't have memory installed.
 		 * Also cpu_up() will call cpu_to_node() for APs when
 		 * MEMORY_HOTPLUG is defined, before per_cpu(numa_node) is set