UPSTREAM: mmc-utils: Add disable partition boot to 'mmc bootpart enable'

Modified 'bootpart enable' function to disable partition boot
by setting the <partition> parameter to 0.

BUG=None
TEST=Compile

Signed-off-by: Markus Schuetterle <markus.schuetterle@intel.com>
Signed-off-by: Chris Ball <chris@printf.net>
(cherry picked from commit bb779acfc385d135b32a6998c1d1fceef0491400)
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>

Change-Id: I9c720f2bfa79db36cd0f4d6d921bce08c1668d84
Reviewed-on: https://chromium-review.googlesource.com/1114438
Commit-Ready: Gwendal Grignou <gwendal@chromium.org>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
diff --git a/mmc.h b/mmc.h
index f786028..fc8904e 100644
--- a/mmc.h
+++ b/mmc.h
@@ -158,6 +158,7 @@
 #define EXT_CSD_HW_RESET_EN		(0x01)
 #define EXT_CSD_HW_RESET_DIS		(0x02)
 #define EXT_CSD_PART_CONFIG_ACC_MASK	  (0x7)
+#define EXT_CSD_PART_CONFIG_ACC_NONE	  (0x0)
 #define EXT_CSD_PART_CONFIG_ACC_BOOT0	  (0x1)
 #define EXT_CSD_PART_CONFIG_ACC_BOOT1	  (0x2)
 #define EXT_CSD_PART_CONFIG_ACC_USER_AREA (0x7)