regmap: Rejig struct declarations for stubbed API

Ensure we have a forward declaration of struct regmap that isn't just
the return value of regmap_init() and make the definition of the
register defaults available.

Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
1 file changed