mmc: sdhci: drop CONFIG_ from CONFIG_SDHCI_CMD_MAX_TIMEOUT

No need for per-SoC adjustment for this parameter.  It should be
determined by the slowest hardware.  Currently, no board overrides
this CONFIG, so 3.2 sec is large enough.  (If not, we can make it
even larger.)
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

drivers/mmc/sdhci.c

@@ -121,12 +121,9 @@ static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
  * for card ready state.
  * Every time when card is busy after timeout then (last) timeout value will be
  * increased twice but only if it doesn't exceed global defined maximum.
- * Each function call will use last timeout value. Max timeout can be redefined
- * in board config file.
+ * Each function call will use last timeout value.
  */
-#ifndef CONFIG_SDHCI_CMD_MAX_TIMEOUT
-#define CONFIG_SDHCI_CMD_MAX_TIMEOUT		3200
-#endif
+#define SDHCI_CMD_MAX_TIMEOUT			3200
 #define SDHCI_CMD_DEFAULT_TIMEOUT		100
 #define SDHCI_READ_STATUS_TIMEOUT		1000
 
@@ -164,7 +161,7 @@ static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
 	while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
 		if (time >= cmd_timeout) {
 			printf("%s: MMC: %d busy ", __func__, mmc_dev);
-			if (2 * cmd_timeout <= CONFIG_SDHCI_CMD_MAX_TIMEOUT) {
+			if (2 * cmd_timeout <= SDHCI_CMD_MAX_TIMEOUT) {
 				cmd_timeout += cmd_timeout;
 				printf("timeout increasing to: %u ms.\n",
 				       cmd_timeout);