serial: 8250_lpss: set PCI master only for private DMA
There is no need to set PCI bus mastering when device is not doing any DMA. Though on Intel Quark DMA is a part of UART IP and thus shares same device in Linux kernel. Enable bus mastering only for Quark case. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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