spi: dw: fixed missing resource_size

fixed the coccicheck:
drivers/spi/spi-dw-bt1.c:220:27-30: ERROR: Missing
resource_size with mem.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/1606114975-31362-1-git-send-email-tiantao6@hisilicon.com


Signed-off-by: Mark Brown <broonie@kernel.org>