layerscape: update tfa to LSDK-20.04

Update tfa package to latest LSDK-20.04 dropping one patch
which had already been integrated.

Add fixes,
- Fix DEPENDS/PKG_BUILD_DEPENDS.
- Remove HIDDEN:=1.
- Move intermediate files installing into Build/InstallDev.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>

package/boot/tfa-layerscape/patches/002-plat-nxp-tools-fix-a-makefile-bug-that-will-use-defa.patch

@@ -1,30 +0,0 @@
-From 65e9a722b44bf28b98fe25b3b174761b47ec7dbd Mon Sep 17 00:00:00 2001
-From: Biwen Li <biwen.li@nxp.com>
-Date: Mon, 1 Apr 2019 13:41:55 +0800
-Subject: [PATCH 2/3] plat/nxp/tools: fix a makefile bug that will use default
- implicit rules
-
-The patch fix a makefile bug that will use default implicit rules,
-because do not have explicit rules for the destination files.
-
-Signed-off-by: Biwen Li <biwen.li@nxp.com>
----
- plat/nxp/tools/Makefile | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/plat/nxp/tools/Makefile b/plat/nxp/tools/Makefile
-index 2095294b..0082a0be 100644
---- a/plat/nxp/tools/Makefile
-+++ b/plat/nxp/tools/Makefile
-@@ -53,7 +53,7 @@ ${PROJECT_2}: ${OBJECTS_2} Makefile
- 	@echo "Built $@ successfully"
- 	@${ECHO_BLANK_LINE}
- 
--%.o: %.c %.h Makefile
-+%.o: %.c Makefile
- 	@echo "  CC      $<"
- 	${Q}${HOSTCC} -c ${CPPFLAGS} ${CFLAGS} ${INCLUDE_PATHS} $< -o $@
- 
--- 
-2.17.1
-