configs: Move SYS_DPAA_QBMAN to Kconfig

The CONFIG_SYS_DPAA_QBMAN define is used by DPAA1 freescale SOCs to
add device tree fixups that allow deep sleep in Linux. The define was
placed in header files included by a number of boards, but was not
explicitly documented in any of the Kconfigs. A description was added
to the drivers/networking menuconfig and default selection for
current SOCs that have this part

Signed-off-by: Ahmed Mansour <ahmed.mansour@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>