ENGR00173283 merge "eMMC: Boot Partition switch func used in MFG tool"

ENGR00173283 merge "eMMC: Boot Partition switch func used in MFG tool"

ENGR125411 eMMC: Boot Partition switch func used in MFG tool

	User can get eMMC partitions info from user space layer in
	linux OS enviroment.
	User can do switch operations between the eMMC boot partitions
	and the user partition.
	User can access the eMMC boot partitions from user space layer
	in linux OS enviroment.
	NOTE:This func had been verified on TOSHIBA eMMC44 card only.

	Signed-off-by: Richard Zhu <r65037@freescale.com>
	Signed-off-by: Rob Herring <r.herring@freescale.com>
Signed-off-by: Ryan QIAN <b32804@freescale.com>