[patch 2/2 v2] drm/exynos: fix a warning message

[Dan Carpenter]

The "ret = regmap_write()" assignment was missing so this error message
is never printed.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
v2: in v1 I just deleted the error message

diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c 
b/drivers/gpu/drm/exynos/exynos_drm_mic.c
index 9869d70..ea2ea17 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
@@ -129,7 +129,7 @@ static void mic_set_path(struct exynos_mic *mic, bool 
enable)
        } else
                val &= ~(MIC0_RGB_MUX | MIC0_I80_MUX | MIC0_ON_MUX);

-       regmap_write(mic->sysreg, DSD_CFG_MUX, val);
+       ret = regmap_write(mic->sysreg, DSD_CFG_MUX, val);
        if (ret)
                DRM_ERROR("mic: Failed to read system register\n");
 }