mfd: madera: Update DT bindings to add additional CODECs

This adds the cs47l15, cs42l92, cs47l92 and cs47l93 to the list of
compatible strings and updates some properties that need to note
the new CODECs.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>