[U-Boot] [U-Boot, v4, 1/4] power: regulator: rk8xx: Build get_ldo_reg only for SPL

[Philipp Tomsich]

> Enabling CONFIG_SPL_POWER_SUPPORT will cause a compiler warning:
>   ‘get_ldo_reg’ defined but not used [-Wunused-function]
> 
> Let's wrap get_ldo_reg(), rk808_ldo and rk818_ldo with ENABLE_DRIVER
> which is only set for non SPL builds.
> 
> Signed-off-by: Wadim Egorov <w.egorov at phytec.de>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
> Changes in v4:
> - Added Reviewed-by: Simon Glass <sjg at chromium.org>
> 
>  drivers/power/regulator/rk8xx.c | 40 +++++++++++++++++++++-------------------
>  1 file changed, 21 insertions(+), 19 deletions(-)
> 

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>