Fall back to input 0 if "default-input" property is not present.

Additionally, documentation in commit bf9c82278c34 ("[media]
media: adv7604: ability to read default input port from DT") states
that the "default-input" property should reside directly in the node
for adv7612. Hence, also adjust the parsing to make the implementation
consistent with this.

Based on patch by William Towle [off-list ref].

Signed-off-by: Ulrich Hecht <redacted>
---
 drivers/media/i2c/adv7604.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 4003831..055c9df 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c

@@ -3077,10 +3077,13 @@ static int adv76xx_parse_dt(struct adv76xx_state *state)
 	if (!of_property_read_u32(endpoint, "default-input", &v))
 		state->pdata.default_input = v;
 	else
-		state->pdata.default_input = -1;
+		state->pdata.default_input = 0;

 	of_node_put(endpoint);

+	if (!of_property_read_u32(np, "default-input", &v))
+		state->pdata.default_input = v;