Staging: MTD: Micron SPINAND Driver support

This patch adds support for Micron SPINAND via MTD.

Signed-off-by: Mona Anonuevo <manonuevo@micron.com>
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>