board_r: fix build with DM_SPI

CC      common/board_r.o
common/board_r.c:747:2: error: ‘initr_spi’ undeclared here (not in a function)
  initr_spi,
  ^
make[1]: *** [common/board_r.o] Error 1

Fixes: ebe76a2df9f6 ("dm: Remove spi_init() from board_r.c when using driver model")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
1 file changed