Add num_caps field for dw_mci_drv_data to validate the controller
id from DT alias and non-DT ways.
Reported-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Fixes: 800d78bf ("mmc: dw_mmc: add support for implementation specific callbacks")
Cc: <stable@vger.kernel.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>