Add method for triggering Sanitize command

This patch adds a method to trigger Sanitize command to MMC.
The Sanitize command is used for deleting the unmapped memory region
of the MMC device.

Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Acked-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/mmc.h b/mmc.h
index c863751..5173d34 100644
--- a/mmc.h
+++ b/mmc.h
@@ -38,6 +38,7 @@
 #define EXT_CSD_PART_CONFIG		179
 #define EXT_CSD_BOOT_WP			173
 #define EXT_CSD_WR_REL_PARAM		166
+#define EXT_CSD_SANITIZE_START		165
 #define EXT_CSD_BKOPS_EN		163	/* R/W */
 #define EXT_CSD_RST_N_FUNCTION		162	/* R/W */
 #define EXT_CSD_NATIVE_SECTOR_SIZE	63 /* R */