mmc: core: Support packed write command for eMMC4.5 device

This patch supports packed write command of eMMC4.5 device.
Several writes can be grouped in packed command and all data
of the individual commands can be sent in a single transfer
on the bus.

Change-Id: I391c3e5f73b785a8b7d25eb8256051020cfb0631
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Maya Erez <merez@codeaurora.org>
6 files changed