[PATCH 04/15] kconfig: introduce option to independently enable libfdt

["Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>]

Currently the inclusion of libfdt is controlled by the CONFIG_HAS_DEVICE_TREE
kconfig flag. This flag also changes behvaior in a few places, such as boot
module processing for XSM. To support the ability to include libfdt without
changing these behaviors, introduce CONFIG_LIB_DEVICE_TREE. The inclusion of
libfdt is then moved under CONFIG_LIB_DEVICE_TREE.

Signed-off-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
---
 xen/common/Kconfig  | 4 ++++
 xen/common/Makefile | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/xen/common/Kconfig b/xen/common/Kconfig
index 90268d92499a..5c592dbdc703 100644
--- a/xen/common/Kconfig
+++ b/xen/common/Kconfig
@@ -53,8 +53,12 @@ config HAS_ALTERNATIVE
 config HAS_COMPAT
        bool
 
+config LIB_DEVICE_TREE
+    bool
+
 config HAS_DEVICE_TREE
        bool
+    select LIB_DEVICE_TREE
 
 config HAS_DIT # Data Independent Timing
        bool
diff --git a/xen/common/Makefile b/xen/common/Makefile
index b279b09bfb2b..ff1795de5dda 100644
--- a/xen/common/Makefile
+++ b/xen/common/Makefile
@@ -78,7 +78,7 @@ obj-y += sched/
 obj-$(CONFIG_UBSAN) += ubsan/
 
 obj-$(CONFIG_NEEDS_LIBELF) += libelf/
-obj-$(CONFIG_HAS_DEVICE_TREE) += libfdt/
+obj-$(CONFIG_LIB_DEVICE_TREE) += libfdt/
 
 CONF_FILE := $(if $(patsubst 
/%,,$(KCONFIG_CONFIG)),$(objtree)/)$(KCONFIG_CONFIG)
 $(obj)/config.gz: $(CONF_FILE)
-- 
2.30.2