Bluetooth: Move missing dts entries logs to info message

If dts entries are missing, might be which are not required entry
for a SoC. Instead of logging them as error message moving them
to log messages.

Change-Id: Ieafa88159a4816d64fb33248a7dd5c82b0d46d3c
Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>