sound: enable building DA7219 driver with ACPIGEN=n

sandbox_defconfig builds the DA7219 driver. It should be possible to
build the sandbox without ACPI support.

ACPI support in the DA7219 driver is only needed when creating an ACPI
table. Fix building with ACPIGEN=n.

Fixes: 0324b712 ("sound: Add an ACPI driver for Dialog Semicondutor da7219")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>