hw/arm: attach MMC to kudo-bmc

Signed-off-by: Shengtan Mao <stmao@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Reviewed-by: Chris Rauer <crauer@google.com>
Message-id: 20220102215844.2888833-3-venture@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/arm/npcm7xx_boards.c

@@ -399,6 +399,7 @@ static void kudo_bmc_init(MachineState *machine)
                           drive_get(IF_MTD, 3, 0));
 
     kudo_bmc_i2c_init(soc);
+    sdhci_attach_drive(&soc->mmc.sdhci, 0);
     npcm7xx_load_kernel(machine, soc);
 }