common: Drop part.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/bcb.c b/cmd/bcb.c
index 62f9a44..b944e62 100644
--- a/cmd/bcb.c
+++ b/cmd/bcb.c
@@ -8,6 +8,7 @@
 #include <android_bootloader_message.h>
 #include <command.h>
 #include <common.h>
+#include <part.h>
 
 enum bcb_cmd {
 	BCB_CMD_LOAD,