mmc: sdhci: Add version V4 definition

Added definitions for v400, v410, v420.
Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci.c

@@ -3524,7 +3524,7 @@ int sdhci_setup_host(struct sdhci_host *host)
 
 	override_timeout_clk = host->timeout_clk;
 
-	if (host->version > SDHCI_SPEC_300) {
+	if (host->version > SDHCI_SPEC_420) {
 		pr_err("%s: Unknown controller version (%d). You may experience problems.\n",
 		       mmc_hostname(mmc), host->version);
 	}

drivers/mmc/host/sdhci.h

@@ -270,6 +270,9 @@
 #define   SDHCI_SPEC_100	0
 #define   SDHCI_SPEC_200	1
 #define   SDHCI_SPEC_300	2
+#define   SDHCI_SPEC_400	3
+#define   SDHCI_SPEC_410	4
+#define   SDHCI_SPEC_420	5
 
 /*
  * End of controller registers.