[PATCH -next] drm/i915: Fix non static symbol warning

[Wei Yongjun <weiyj.lk@gmail.com>]

From: Wei Yongjun <weiyongjun1@huawei.com>

Fixes the following sparse warning:

drivers/gpu/drm/i915/intel_dp.c:1527:5: warning:
 symbol 'intel_dp_compute_bpp' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 69cee9b..acd0c51 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1524,8 +1524,8 @@ void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock,
 	}
 }
 
-int intel_dp_compute_bpp(struct intel_dp *intel_dp,
-			 struct intel_crtc_state *pipe_config)
+static int intel_dp_compute_bpp(struct intel_dp *intel_dp,
+				struct intel_crtc_state *pipe_config)
 {
 	int bpp, bpc;