x86: Fix various typos in comments

Go over arch/x86/ and fix common typos in comments,
and a typo in an actual function argument name.

No change in functionality intended.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/kernel/acpi/boot.c

@@ -848,7 +848,7 @@ EXPORT_SYMBOL(acpi_unregister_ioapic);
 /**
  * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
  *			    has been registered
- * @handle:	ACPI handle of the IOAPIC deivce
+ * @handle:	ACPI handle of the IOAPIC device
  * @gsi_base:	GSI base associated with the IOAPIC
  *
  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()