mmc: xenon_sdhci: Remove duplicated macros

There is no need to define the same macros in drivers.
All macros have been added by commit 17a42abb ("mmc: Define timing
macro's").
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NJaehoon Chung <jh80.chung@samsung.com>

drivers/mmc/xenon_sdhci.c

@@ -104,18 +104,6 @@ DECLARE_GLOBAL_DATA_PTR;
 /* Hyperion only have one slot 0 */
 #define XENON_MMC_SLOT_ID_HYPERION		0
 
-#define MMC_TIMING_LEGACY	0
-#define MMC_TIMING_MMC_HS	1
-#define MMC_TIMING_SD_HS	2
-#define MMC_TIMING_UHS_SDR12	3
-#define MMC_TIMING_UHS_SDR25	4
-#define MMC_TIMING_UHS_SDR50	5
-#define MMC_TIMING_UHS_SDR104	6
-#define MMC_TIMING_UHS_DDR50	7
-#define MMC_TIMING_MMC_DDR52	8
-#define MMC_TIMING_MMC_HS200	9
-#define MMC_TIMING_MMC_HS400	10
-
 #define XENON_MMC_MAX_CLK	400000000
 #define XENON_MMC_3V3_UV	3300000
 #define XENON_MMC_1V8_UV	1800000