[PATCH -next] drm/amd/display: Make pow_buffer_ptr static

[YueHaibing]

Fix sparse warning:

drivers/gpu/drm/amd/amdgpu/../display/modules/color/color_gamma.c:62:5:
 warning: symbol 'pow_buffer_ptr' was not declared. Should it be static?

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c 
b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
index ed894cd..5332168 100644
--- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
+++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
@@ -59,7 +59,7 @@ static struct translate_from_linear_space_args 
scratch_gamma_args;
  */
 static struct fixed31_32 pow_buffer[NUM_PTS_IN_REGION];
 static struct fixed31_32 gamma_of_2; // 2^gamma
-int pow_buffer_ptr = -1;
+static int pow_buffer_ptr = -1;
 
 static const int32_t gamma_numerator01[] = { 31308,    180000, 0};
 static const int32_t gamma_numerator02[] = { 12920,    4500,   0};
-- 
2.7.4