[PATCH -next] platform/surface: aggregator_registry: Make symbol 'ssam_base_hub_group' static

["'Wei Yongjun" <weiyongjun1@xxxxxxxxxx>]

From: Wei Yongjun <weiyongjun1@xxxxxxxxxx>

The sparse tool complains as follows:

drivers/platform/surface/surface_aggregator_registry.c:355:30: warning:
 symbol 'ssam_base_hub_group' was not declared. Should it be static?

This symbol is not used outside of surface_aggregator_registry.c, so this
commit marks it static.

Fixes: 797e78564634 ("platform/surface: aggregator_registry: Add base device hub")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 .../platform/surface/surface_aggregator_registry.c  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/surface/surface_aggregator_registry.c b/drivers/platform/surface/surface_aggregator_registry.c
index cdb4a95af3e8..86cff5fce3cd 100644
--- a/drivers/platform/surface/surface_aggregator_registry.c
+++ b/drivers/platform/surface/surface_aggregator_registry.c
@@ -352,7 +352,7 @@ static struct attribute *ssam_base_hub_attrs[] = {
 	NULL,
 };
 
-const struct attribute_group ssam_base_hub_group = {
+static const struct attribute_group ssam_base_hub_group = {
 	.attrs = ssam_base_hub_attrs,
 };