init_ras_hotplug_IRQ() is a local routine used by a machine init call
and it doesn't need to be external.

It fixes this W=1 compile error:

../arch/powerpc/platforms/pseries/ras.c:125:12: error: no previous prototype for ‘init_ras_hotplug_IRQ’ [-Werror=missing-prototypes]
  125 | int __init init_ras_hotplug_IRQ(void)
      |            ^~~~~~~~~~~~~~~~~~~~

Fixes: c9dccf1d074a ("powerpc/pseries: Enable RAS hotplug events later")
Cc: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Cc: Ganesh Goudar <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/platforms/pseries/ras.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index bcb614ffce6a..d2fca1aa6742 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c

@@ -122,7 +122,7 @@ static inline u8 rtas_mc_error_sub_type(const struct pseries_mc_errorlog *mlog)
  * devices or systems (e.g. hugepages) that have not been initialized at the
  * subsys stage.
  */
-int __init init_ras_hotplug_IRQ(void)
+static int __init init_ras_hotplug_IRQ(void)
 {
 	struct device_node *np;
 

-- 
2.26.2