[meta-xilinx] Loading FPGA firmware broken in 2018.3

[Mike Looijmans]

With the 2018.1 version of u-boot, atf and pmu this worked okay.

With the "thud" release and 2018.3, loading the FPGA no longer works:

ZynqMP> load mmc $sdbootdev:2 0x100000 /lib/firmware/fpga.bin
19311092 bytes read in 1900 ms (9.7 MiB/s)
ZynqMP> fpga load 0 0x100000 $filesize
ZynqMP> md 0x100000
00100000: ffffffff ffffffff ffffffff ffffffff    ................
00100010: ffffffff ffffffff ffffffff ffffffff    ................
00100020: ffffffff ffffffff ffffffff ffffffff    ................
00100030: ffffffff ffffffff ffffffff ffffffff    ................
00100040: 000000bb 11220044 ffffffff ffffffff    ....D.".........
00100050: aa995566 20000000 20000000 30022001    fU..... ... . .0
00100060: 00000000 30020001 00000000 30008001    .......0.......0
00100070: 00000000 20000000 30008001 00000007    ....... ...0....
00100080: 20000000 20000000 30002001 00000000    ... ... . .0....
00100090: 30026001 00000000 30012001 38003fe5    .`.0..... .0.?.8
001000a0: 3001c001 00400000 30018001 04a5a093    ...0.. at ....0....
001000b0: 30008001 00000009 20000000 3000c001    ...0....... ...0
001000c0: 00000001 3000a001 00000101 3000c001    .......0.......0
001000d0: 00000000 30030001 00000000 20000000    .......0.......
001000e0: 20000000 20000000 20000000 20000000    ... ... ... ...
001000f0: 20000000 20000000 20000000 30002001    ... ... ... . .0
ZynqMP>


No error is displayed, but the FPGA remains unprogrammed (as indicated by the 
PROG_DONE pin).

Reverting to previous sumo version makes it work again.