dumpstate: Dump eMMC 5.0 stats

Extended csd EXT_CSD_REV, PRE_EOL_INFO, DEVICE_LIFE_TIME_EST_TYP_A,
and DEVICE_LIFE_TIME_EST_TYP_B fields printed if available. Allow
dumpstate access to /sys/kernel/debug/mmc0/mmc0:0001/ext_csd.

Bug: 24200279
Change-Id: I310bdcf546a9307cf927f109359ad5a6d24b70f8
diff --git a/cmds/dumpstate/dumpstate.h b/cmds/dumpstate/dumpstate.h
index c5d3044..228f09c 100644
--- a/cmds/dumpstate/dumpstate.h
+++ b/cmds/dumpstate/dumpstate.h
@@ -84,4 +84,7 @@
 /* Implemented by libdumpstate_board to dump board-specific info */
 void dumpstate_board();
 
+/* dump eMMC Extended CSD data */
+void dump_emmc_ecsd(const char *ext_csd_path);
+
 #endif /* _DUMPSTATE_H_ */