of/platform: Inform about created platform devices using pr_debug()

For most nodes with a compatible property a platform device is created.
For some an amba device is created instead. For the latter
of_amba_device_create() emits a message at debug level about the node
the device is created from. Add a similar message to
of_platform_device_create_pdata() to inform about the whole list of
created devices.

This also gives the right context for the following messages that
inform about created child devices.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20240222153119.2026363-2-u.kleine-koenig@pengutronix.de


Signed-off-by: Rob Herring <robh@kernel.org>