sparc: Fix typos

Fix typos, most reported by "codespell arch/sparc".  Only touches
comments, no code changes.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: sparclinux@vger.kernel.org
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Link: https://lore.kernel.org/r/20240103231605.1801364-9-helgaas@kernel.org
diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c
index 72da2e1..5280e32 100644
--- a/arch/sparc/kernel/irq_64.c
+++ b/arch/sparc/kernel/irq_64.c
@@ -980,7 +980,7 @@ void notrace init_irqwork_curcpu(void)
  *
  * On SMP this gets invoked from the CPU trampoline before
  * the cpu has fully taken over the trap table from OBP,
- * and it's kernel stack + %g6 thread register state is
+ * and its kernel stack + %g6 thread register state is
  * not fully cooked yet.
  *
  * Therefore you cannot make any OBP calls, not even prom_printf,