This patch set up a cmdline option for omap dma for masking the

    available channels. It is needed since the OMAP DMA is a system wide
    resource and can be used by another software apart from the kernel.

    To reserve the omap SDMA channels for kernel dma usage, use cmdline
    bootarg "omap_dma_reserve_ch=". The valid range is 1 to 32.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked By: Nishant Kamat <nskamat@ti.com>
cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>