of: Move of_dma_configure() to device.c to help re-use

of: Move of_dma_configure() to device.c to help re-use

Move of_dma_configure() to device.c so it can be re-used for PCI devices to
obtain DMA configuration from DT.  Also add a second argument so that for
PCI, the DT node of root bus host bridge can be used to obtain the DMA
configuration for the slave PCI device.

Tested-by: Suravee Suthikulpanit <[email protected]> (AMD Seattle)
Signed-off-by: Murali Karicheri <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Catalin Marinas <[email protected]>
Acked-by: Will Deacon <[email protected]>
Acked-by: Rob Herring <[email protected]>
CC: Joerg Roedel <[email protected]>
CC: Grant Likely <[email protected]>
CC: Russell King <[email protected]>
CC: Arnd Bergmann <[email protected]>