lib: fdt: Allow LZO and GZIP DT compression in U-Boot

Add required Kconfig symbols, Makefile bits and macro fixes in a
few places to support LZO and DT compression in U-Boot. This can
save a lot of space with multi-DTB fitImages.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
diff --git a/lib/Kconfig b/lib/Kconfig
index 366d164..8fe5d85 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -301,6 +301,19 @@
 	help
 	  This enables support for LZO compression algorithm.r
 
+config GZIP
+	bool "Enable gzip decompression support for SPL build"
+	select ZLIB
+	default y
+	help
+	  This enables support for GZIP compression algorithm.
+
+config ZLIB
+	bool
+	default y
+	help
+	  This enables ZLIB compression lib.
+
 config SPL_LZ4
 	bool "Enable LZ4 decompression support in SPL"
 	help