[PATCH 4.1 51/86] Revert "serial: 8250_dma: dont bother DMA with small transfers"

4.1-stable review patch. If anyone has any objections, please let me know. -- From: Frederic Danis commit f967fc8f165fadb72166f2bd4785094b3ca21307 upstream. This reverts commit 9119fba0cfeda6d415c9f068df66838a104b87cb. This commit prevents from sending "big" file using

[PATCH 4.1 51/86] Revert "serial: 8250_dma: dont bother DMA with small transfers"

4.1-stable review patch. If anyone has any objections, please let me know. -- From: Frederic Danis commit f967fc8f165fadb72166f2bd4785094b3ca21307 upstream. This reverts commit 9119fba0cfeda6d415c9f068df66838a104b87cb. This commit prevents