lib: spl: differentiate between TPL and SPL for libfdt/of_control/of_platdata

This splits the compilation of code modules for TPL and SPL for
OF_CONTROL (and related) features between TPL and SPL.  The typical
use-case of this is a TPL stage that uses OF_PLATDATA at TPL and
provides full OF_CONTROL at SPL (e.g. on the RK3368).
Signed-off-by: NPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NTom Rini <trini@konsulko.com>

lib/Makefile

@@ -49,11 +49,11 @@ obj-$(CONFIG_RSA) += rsa/
 obj-$(CONFIG_SHA1) += sha1.o
 obj-$(CONFIG_SHA256) += sha256.o
 
-obj-$(CONFIG_SPL_SAVEENV) += qsort.o
-obj-$(CONFIG_$(SPL_)OF_LIBFDT) += libfdt/
-ifneq ($(CONFIG_SPL_BUILD)$(CONFIG_SPL_OF_PLATDATA),yy)
-obj-$(CONFIG_$(SPL_)OF_CONTROL) += fdtdec_common.o
-obj-$(CONFIG_$(SPL_)OF_CONTROL) += fdtdec.o
+obj-$(CONFIG_$(SPL_TPL_)SAVEENV) += qsort.o
+obj-$(CONFIG_$(SPL_TPL_)OF_LIBFDT) += libfdt/
+ifneq ($(CONFIG_$(SPL_TPL_)BUILD)$(CONFIG_$(SPL_TPL_)OF_PLATDATA),yy)
+obj-$(CONFIG_$(SPL_TPL_)OF_CONTROL) += fdtdec_common.o
+obj-$(CONFIG_$(SPL_TPL_)OF_CONTROL) += fdtdec.o
 endif
 
 ifdef CONFIG_SPL_BUILD