The U-Boot build for the MT7988 reference board booting from SD card wrongly depended on the 'ddr4' variant of the ARM TrustedFirmware-A build even though the 'comb' variant is used. Fix that dependency. Fixes:572ea68070("uboot-mediatek: add patches for MT7988 and builds for RFB") Signed-off-by: Daniel Golle <daniel@makrotopia.org> (cherry picked from commit78e3adcaf9)