spmi: msm: handle peripheral ownership

spmi: msm: handle peripheral ownership

The cnfg registers provides the owner id for each peripheral,
so we can use this id to check if we're allowed to write register
to each peripherals.

Since the v5 can handle more peripherals, add the max_channels to
scan more starting from version 5, make the channel_map store
32bit values and introduce the SPMI_CHANNEL_READ_ONLY flag to
mark a peripheral as read-only.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Acked-by: Caleb Connolly <caleb.connolly@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>