Fix label mismatch for extcsd: Device life time estimation type A

BUG=None
TEST=Tested in peach_pit. Label corrected.

Change-Id: I12afff1a5354264c16fbfb4ad08d48e45402003f
Reviewed-on: https://chromium-review.googlesource.com/188615
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Commit-Queue: Puthikorn Voravootivat <puthik@chromium.org>
Tested-by: Puthikorn Voravootivat <puthik@chromium.org>
diff --git a/mmc_cmds.c b/mmc_cmds.c
index 4b9b12e..c856eb8 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -824,9 +824,10 @@
 				" 0x%02x\n", j, ext_csd[j]);
 		for (j = 269; j >= 268; j--) {
 			__u8 life_used=ext_csd[j];
-			printf("Device life time estimation type B"
+			char est_type = 'B' + (j - 269);
+			printf("Device life time estimation type %c"
 				" [DEVICE_LIFE_TIME_EST_TYP_%c: 0x%02x]\n",
-				'B' + (j - 269), life_used);
+				est_type, est_type, life_used);
 			if (life_used >= 0x1 && life_used <= 0xa)
 				printf(" i.e. %d%% - %d%% device life time"
 					" used\n",