mmc: sd: Macro name cleanup for high speed dtr

Add new macros for the high speed 50MHz case, rather than having
a confusing reuse of the value for UHS SDR50, which is 100MHz.

Reported-by: Aaron Lu <aaron.lu@amd.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/core/sd.c

@@ -307,8 +307,8 @@ static int mmc_read_switch(struct mmc_card *card)
 		goto out;
 	}
 
-	if (status[13] & UHS_SDR50_BUS_SPEED)
-		card->sw_caps.hs_max_dtr = 50000000;
+	if (status[13] & SD_MODE_HIGH_SPEED)
+		card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
 
 	if (card->scr.sda_spec3) {
 		card->sw_caps.sd3_bus_mode = status[13];

include/linux/mmc/card.h

@@ -110,18 +110,21 @@ struct sd_ssr {
 struct sd_switch_caps {
 	unsigned int		hs_max_dtr;
 	unsigned int		uhs_max_dtr;
+#define HIGH_SPEED_MAX_DTR	50000000
 #define UHS_SDR104_MAX_DTR	208000000
 #define UHS_SDR50_MAX_DTR	100000000
 #define UHS_DDR50_MAX_DTR	50000000
 #define UHS_SDR25_MAX_DTR	UHS_DDR50_MAX_DTR
 #define UHS_SDR12_MAX_DTR	25000000
 	unsigned int		sd3_bus_mode;
 #define UHS_SDR12_BUS_SPEED	0
+#define HIGH_SPEED_BUS_SPEED	1
 #define UHS_SDR25_BUS_SPEED	1
 #define UHS_SDR50_BUS_SPEED	2
 #define UHS_SDR104_BUS_SPEED	3
 #define UHS_DDR50_BUS_SPEED	4
 
+#define SD_MODE_HIGH_SPEED	(1 << HIGH_SPEED_BUS_SPEED)
 #define SD_MODE_UHS_SDR12	(1 << UHS_SDR12_BUS_SPEED)
 #define SD_MODE_UHS_SDR25	(1 << UHS_SDR25_BUS_SPEED)
 #define SD_MODE_UHS_SDR50	(1 << UHS_SDR50_BUS_SPEED)