regulator: axp20x: fix DCDCB and BLDO2 definitions for AXP806

This fixes another set of errors from the refactoring of literals
to mask preproccesor definitions.

Found by debugging a broken voltage setup on Orange Pi One Plus.

Fixes: db4a555f ("regulator: axp20x: use defines for masks")
Signed-off-by: Ondrej Jirman <megous@megous.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>