linux-gbmc: Readd partition table support

Our vendors mount eMMC by making a singular partition table. Support
for this was removed in c0c178fb8e. Bring it back for now to not break
existing vendor scripts.

Change-Id: Ibeed69e583ad627b10cecaa378122ca7e5e58582
Signed-off-by: Vlad Sytchenko <vsytch@google.com>
diff --git a/recipes-kernel/linux/files/defconfig b/recipes-kernel/linux/files/defconfig
index 6ba4278..a9bc909 100644
--- a/recipes-kernel/linux/files/defconfig
+++ b/recipes-kernel/linux/files/defconfig
@@ -40,6 +40,8 @@
 CONFIG_STRICT_MODULE_RWX=y
 CONFIG_COMPAT_32BIT_TIME=y
 CONFIG_PARTITION_ADVANCED=y
+CONFIG_MSDOS_PARTITION=y
+CONFIG_EFI_PARTITION=y
 CONFIG_COMPACTION=y
 CONFIG_KSM=y
 CONFIG_NET=y