Revert "x86: Convert MMC to driver model"

This reverts commit ddb3ac3c716f56cead695444e65a7ba7b0946555.

With MMC converted to driver model, SCSI driver is broken due to
zero address access at (ops->read) in block_dread() function.

The fix (SCSI driver converted to DM) is ready in u-boot-dm branch,
but it is too late for this relese to get that in.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/quark/quark.c b/arch/x86/cpu/quark/quark.c
index c36a589..0c2cea4 100644
--- a/arch/x86/cpu/quark/quark.c
+++ b/arch/x86/cpu/quark/quark.c
@@ -16,6 +16,11 @@
 #include <asm/arch/msg_port.h>
 #include <asm/arch/quark.h>
 
+static struct pci_device_id mmc_supported[] = {
+	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_QRK_SDIO },
+	{},
+};
+
 static void quark_setup_mtrr(void)
 {
 	u32 base, mask;
@@ -323,6 +328,11 @@
 	return 0;
 }
 
+int cpu_mmc_init(bd_t *bis)
+{
+	return pci_mmc_init("Quark SDHCI", mmc_supported);
+}
+
 int arch_misc_init(void)
 {
 #ifdef CONFIG_ENABLE_MRC_CACHE