CC      spl/drivers/mtd/spi/sf_probe.o
In file included from drivers/mtd/spi/sf_probe.c:11:0:
drivers/mtd/spi/sf_probe.c: In function 'spi_flash_std_probe':
drivers/mtd/spi/sf_probe.c:155:54: error: dereferencing pointer to incomplete type 'struct dm_spi_slave_platdata'
  debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
                                                      ^
include/common.h:68:26: note: in definition of macro 'debug_cond'
    printf(pr_fmt(fmt), ##args); \
                          ^
drivers/mtd/spi/sf_probe.c:155:2: note: in expansion of macro 'debug'
  debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
  ^
scripts/Makefile.build:280: recipe for target 'spl/drivers/mtd/spi/sf_probe.o' failed
make[6]: *** [spl/drivers/mtd/spi/sf_probe.o] Error 1
scripts/Makefile.build:425: recipe for target 'spl/drivers/mtd/spi' failed
make[5]: *** [spl/drivers/mtd/spi] Error 2
scripts/Makefile.spl:364: recipe for target 'spl/drivers' failed
make[4]: *** [spl/drivers] Error 2
Makefile:1408: recipe for target 'spl/u-boot-spl' failed
make[3]: *** [spl/u-boot-spl] Error 2