adc: meson-saradc: fix regmap_init_mem call

The SARADC driver was merged after the following commit :
commit d35812368a59 ("regmap: change regmap_init_mem() to take ofnode instead udevice")
Thus breaking build, this patch fixes the regmap_init_mem accordingly.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
1 file changed