Bluetooth: btintel: Fixe build regression

This fixes the following build regression:

drivers-bluetooth-btintel.c-btintel_read_version()-warn:
passing-zero-to-PTR_ERR

Fixes: b79e0409 ("Bluetooth: btintel: Fix null ptr deref in btintel_read_version")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>