spi: sh-msiof: SPI_SH_MSIOF should depend on HAS_DMA

If NO_DMA=y:

    drivers/built-in.o: In function `sh_msiof_release_dma':
    spi-sh-msiof.c:(.text+0x23cbfe): undefined reference to `dma_unmap_single'
    drivers/built-in.o: In function `sh_msiof_request_dma':
    spi-sh-msiof.c:(.text+0x23cd5e): undefined reference to `dma_map_single'
    spi-sh-msiof.c:(.text+0x23cd70): undefined reference to `dma_mapping_error'
    spi-sh-msiof.c:(.text+0x23cdca): undefined reference to `dma_unmap_single'
    drivers/built-in.o: In function `sh_msiof_dma_once':
    spi-sh-msiof.c:(.text+0x23d450): undefined reference to `dma_sync_single_for_cpu'
    spi-sh-msiof.c:(.text+0x23d5ea): undefined reference to `dma_sync_single_for_cpu'

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>