mmc: Migrate MMC_SUPPORTS_TUNING to Kconfig

The constraints on the MMC_SUPPORTS_TUNING symbol can easily be
expressed in Kconfig (with the addition of SPL_MMC_SUPPORTS_TUNING).
Furthermore, in order to remove <common.h> from the MMC subsystem, the
way this symbol is used today needs to be changed in order to continue
functioning.

Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/mmc.h b/include/mmc.h
index 4b8327f..7f19003 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -18,13 +18,6 @@
 
 struct bd_info;
 
-#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
-#define MMC_SUPPORTS_TUNING
-#endif
-#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
-#define MMC_SUPPORTS_TUNING
-#endif
-
 /* SD/MMC version bits; 8 flags, 8 major, 8 minor, 8 change */
 #define SD_VERSION_SD	(1U << 31)
 #define MMC_VERSION_MMC	(1U << 30)
@@ -485,7 +478,7 @@
 	 */
 	int (*get_wp)(struct udevice *dev);
 
-#ifdef MMC_SUPPORTS_TUNING
+#if CONFIG_IS_ENABLED(MMC_SUPPORTS_TUNING)
 	/**
 	 * execute_tuning() - Start the tuning process
 	 *