commonlib/storage: Add common eMMC functions

Now that multiple platforms are trying to initialize eMMC in coreboot
instead of depthcharge, lets move common functionality into commonlib
instead of copying the same functionality between multiple platforms.
Note for consistency, changed name of set_early_mmc_wake_status() to
mmc_set_early_wake_status().  Also adding an mmc_send_cmd1() function
for retrieving the Operating Conditions Register (OCR) contents.

BUG=b:218406702
BRANCH=None
TEST=emerge-herobrine coreboot chromeos-bootimage
     flash onto villager device and make sure still boots ChromeOS

Change-Id: Id00535b05bbd379081712601ef10e762c1831747
Signed-off-by: Shelley Chen <shchen@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71827
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/soc/intel/common/block/scs/early_mmc.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <acpi/acpi.h>
-#include <cbmem.h>
 #include <commonlib/storage/sd_mmc.h>
 #include <commonlib/sd_mmc_ctrlr.h>
 #include <commonlib/sdhci.h>
@@ -41,22 +40,6 @@ static void disable_mmc_controller_bar(void)
 				~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY));
 }
 
-static void set_early_mmc_wake_status(int32_t status)
-{
-	int32_t *ms_cbmem;
-
-	ms_cbmem = cbmem_add(CBMEM_ID_MMC_STATUS, sizeof(int));
-
-	if (ms_cbmem == NULL) {
-		printk(BIOS_ERR,
-			"%s: Failed to add early mmc wake status to cbmem!\n",
-			__func__);
-		return;
-	}
-
-	*ms_cbmem = status;
-}
-
 int early_mmc_wake_hw(void)
 {
 	struct storage_media media;
@@ -108,7 +91,7 @@ int early_mmc_wake_hw(void)
 
 	disable_mmc_controller_bar();
 
-	set_early_mmc_wake_status(1);
+	mmc_set_early_wake_status(1);
 	return 0;
 
 out_err: