mmc: core: add sd uhs string for mmc_ios_show

This is a minor fix. It makes mmc_ios_show print proper string when the
host's timing is one of the newly added UHS-I modes.

Signed-off-by: Aaron Lu <aaron.lu@amd.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
index 5acd707..96c603b 100644
--- a/drivers/mmc/core/debugfs.c
+++ b/drivers/mmc/core/debugfs.c
@@ -114,6 +114,15 @@
 	case MMC_TIMING_SD_HS:
 		str = "sd high-speed";
 		break;
+	case MMC_TIMING_UHS_SDR50:
+		str = "sd uhs SDR50";
+		break;
+	case MMC_TIMING_UHS_SDR104:
+		str = "sd uhs SDR104";
+		break;
+	case MMC_TIMING_UHS_DDR50:
+		str = "sd uhs DDR50";
+		break;
 	default:
 		str = "invalid";
 		break;