powerpc/xive: Fix endian conversion size

[ Upstream commit ff7a60a ]

Sparse reports a size mismatch in the endian swap. The Opal
implementation[1] passes the value as a __be64, and the receiving
variable out_qsize is a u64, so the use of be32_to_cpu() appears to be
an error.

[1]: https://github.com/open-power/skiboot/blob/80e2b1dc73/hw/xive.c#L3854

Fixes: 88ec6b9 ("powerpc/xive: add OPAL extensions for the XIVE native exploitation support")
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231011053711.93427-2-bgray@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

arch/powerpc/sysdev/xive/native.c

@@ -802,7 +802,7 @@ int xive_native_get_queue_info(u32 vp_id, u32 prio,
  if (out_qpage)
  *out_qpage = be64_to_cpu(qpage);
  if (out_qsize)
- *out_qsize = be32_to_cpu(qsize);
+ *out_qsize = be64_to_cpu(qsize);
  if (out_qeoi_page)
  *out_qeoi_page = be64_to_cpu(qeoi_page);
  if (out_escalate_irq)