armv8: ls1088a: Add IFC and eMMC as qixis boot sources

Add macro QIXIS_LBMAP_EMMC, QIXIS_LBMAP_IFC, QIXIS_RCW_SRC_IFC,
QIXIS_RCW_SRC_EMMC to enable IFC and eMMC as boot sources for
qixis commands.

Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
[YS: Modify subject and add commit message]
Reviewed-by: York Sun <york.sun@nxp.com>