mtd: nand: MTD_NAND_HISI504 should depend on HAS_DMA

If NO_DMA=y:

    drivers/built-in.o: In function `hisi_nfc_probe':
    hisi504_nand.c:(.text+0x23e646): undefined reference to `dmam_alloc_coherent'

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>