In commit <db4080d5>, SPL_FSL_PBL is removed from the configs of
some LayerScape platforms. Actually, SPL_FSL_PBL is needed for SD/NAND
boot on LS1021A/LS1043A/LS1046A to create boot binary having SPL binary
in PBI format concatenated with u-boot binary. SPL_FRAMEWORK is used on
these platforms too.

Signed-off-by: Alison Wang <alison.wang@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>