[MIPS] Alchemy: dbdma: add API to delete custom DDMA device ids.

Add API to delete custom DDMA device ids create with
au1xxx_ddma_device_add().

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2 files changed