drm/radeon/kms: register an i2c adapter name for the dp aux bus

This causes the connector to not be added since i2c init fails
for the adapter. Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=31688

Noticed by Ari Savolainen.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: Ari Savolainen <ari.m.savolainen@gmail.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

authored by Alex Deucher and committed by Dave Airlie a5193fe5 3e4b9982

+1
+1
drivers/gpu/drm/radeon/radeon_i2c.c
··· 946 946 i2c->rec = *rec; 947 947 i2c->adapter.owner = THIS_MODULE; 948 948 i2c->dev = dev; 949 + sprintf(i2c->adapter.name, "Radeon aux bus %s", name); 949 950 i2c_set_adapdata(&i2c->adapter, i2c); 950 951 i2c->adapter.algo_data = &i2c->algo.dp; 951 952 i2c->algo.dp.aux_ch = radeon_dp_i2c_aux_ch;