[MTK] How to enable eMMC and UFS combo

[DESCRIPTION]

Use the same SW to support eMMB and UFS.

[SOLUTION]

 1. Preloader

• Preloader is special, because it have size limit and it have no MTK_UFS_SUPPORT option.

          -- Use another compile option to decide if need eMMC and UFS Combo
               platform/[PROJ]/src/core/inc/boot_device.h：
                #define BOOTDEV_SDMMC_UFS_COMBO
          -- if BOOTDEV_SDMMC_UFS_COMBO not define, only link the cust_bldr.mak setting

              (CFG_BOOT_DEV :=BOOTDEV_SDMMC or CFG_BOOT_DEV :=BOOTDEV_UFS)

• eMMC option

         MTK_EMMC_SUPPORT=yes 

• Other eMMC option can turn on directly if need

         MTK_EMMC_SUPPORT_OTP=yes

• Other UFS option can turn on directly if need

         MTK_UFS_OTP_SUPPORT=yes
         MTK_UFS_POWP_SUPPORT=yes

 2. LK

• Turn on both MTK_UFS_SUPPORT and MTK_EMMC_SUPPORT in

         LK project/[PROJ].mk

• After turn on, then LK is support both storage.
• Other eMMC option can turn on directly if need

         MTK_EMMC_SUPPORT_OTP = yes
         DEFINES += MTK_NEW_COMBO_EMMC_SUPPORT

• Other UFS option can turn on directly if need

         MTK_UFS_OTP = yes

 3. Kernel

• Turn on both CONFIG_MTK_UFS_SUPPORT and CONFIG_MTK_EMMC_SUPPORT in

         Kernel [PROJ]_defconfig

• After turn on, then kernel is support both storage.
• eMMC option also need

         CONFIG_MMC_MTK_PRO=y

• UFS option also need

         CONFIG_SCSI_UFSHCD=y
         CONFIG_SCSI_UFSHCD_PLATFORM=y
         Remove # CONFIG_SCSI_LOWLEVEL is not set

• Other eMMC option can turn on directly if need

         CONFIG_MTK_EMMC_CACHE=y
         CONFIG_MTK_EMMC_SUPPORT_OTP=y
         CONFIG_MTK_EMMC_CQ_SUPPORT=y

 4. Android

• Turn on both MTK_UFS_SUPPORT and MTK_EMMC_SUPPORT in

         Android [PROJ]/ProjectConfig.mk

• After turn on, then Android is support both storage.
• Other eMMC option can turn on directly if need

         MTK_EMMC_SUPPORT_OTP = yes
         MTK_NEW_COMBO_EMMC_SUPPORT = yes

• Other UFS option can turn on directly if need

         MTK_UFS_OTP = yes