meta-google: image: enable tcpdump for prod image

The tcpdump is required to prod debug NVMe OOB issues.

Signed-off-by: Hao Jiang <jianghao@google.com>
Change-Id: I925a790567c1e9ea7d032feb5defa399a6530be2
diff --git a/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend b/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend
index 4e6827d..e240c91 100644
--- a/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend
+++ b/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend
@@ -24,7 +24,7 @@
 # Include these useful utilities for all gbmc platforms
 OBMC_IMAGE_EXTRA_INSTALL:append:gbmc = " ipmitool"
 OBMC_IMAGE_EXTRA_INSTALL:append:gbmc = " lrzsz"
-OBMC_IMAGE_EXTRA_INSTALL:append:gbmc:dev = " tcpdump"
+OBMC_IMAGE_EXTRA_INSTALL:append:gbmc = " tcpdump"
 
 # Add gBMC update recipes
 OBMC_IMAGE_EXTRA_INSTALL:append:gbmc = " dummy-gbmc-update"