HID: intel-ish-hid: Move DMA disable code to new function
Add a new function ish_disable_dma() and move DMA disable operations here, so that this functionality can be reused. Signed-off-by: NEven Xu <even.xu@intel.com> Acked-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: NJiri Kosina <jkosina@suse.cz>
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