regulator: sy8824x: add prefixes to BUCK_EN and MODE macros

Add prefixes to BUCK_EN and MODE macros to namespace them.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20190829143927.395d0385@xhacker.debian


Signed-off-by: Mark Brown <broonie@kernel.org>