boot/ti-k3-r5-loader: share download files with uboot

ti-k3-r5-loader is just a U-Boot SPL running on the R5 core on TI's K3
processors, so it makes sense to just share the downloads with U-Boot.

With commit ebe238f2b595 (package/pkg-download: use _DL_SUBDIR as root
dir of generated archives), the root of the generated archive will also
be based on _DL_SUBDIR, but the name of the archive, _SOURCE, is still
based on the current package unless explicitly set. For ti-k3-r5-loader,
that would create an archive which fiename does not match its root
directory; although Buildroot does not care (we --strip-components=1
when extracting), this would be a bit surprising to anyone manually
extrating the archive, as it diverges from the usual expectations.

Do like we do for linux-headers, and force the ti-k3-r4-loader archive
filename to be u-boot-VERSION.tar.gz

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Bryan Brattlof <bb@ti.com>
Cc: Xuanhao Shi <X15000177@gmail.com>
Cc: Paresh Bhagat <p-bhagat@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Signed-off-by: Romain Naour <romain.naour@smile.fr>

boot/ti-k3-r5-loader/ti-k3-r5-loader.mk

@@ -5,6 +5,7 @@
 ################################################################################
 
 TI_K3_R5_LOADER_VERSION = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_VERSION))
+TI_K3_R5_LOADER_DL_SUBDIR = uboot
 
 ifeq ($(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_TARBALL),y)
 # Handle custom U-Boot tarballs as specified by the configuration
@@ -14,12 +15,15 @@ TI_K3_R5_LOADER_SOURCE = $(notdir $(TI_K3_R5_LOADER_TARBALL))
 else ifeq ($(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_GIT),y)
 TI_K3_R5_LOADER_SITE = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_REPO_URL))
 TI_K3_R5_LOADER_SITE_METHOD = git
+TI_K3_R5_LOADER_SOURCE = u-boot-$(TI_K3_R5_LOADER_VERSION).tar.gz
 else ifeq ($(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_HG),y)
 TI_K3_R5_LOADER_SITE = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_REPO_URL))
 TI_K3_R5_LOADER_SITE_METHOD = hg
+TI_K3_R5_LOADER_SOURCE = u-boot-$(TI_K3_R5_LOADER_VERSION).tar.gz
 else ifeq ($(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_SVN),y)
 TI_K3_R5_LOADER_SITE = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_REPO_URL))
 TI_K3_R5_LOADER_SITE_METHOD = svn
+TI_K3_R5_LOADER_SOURCE = u-boot-$(TI_K3_R5_LOADER_VERSION).tar.gz
 else
 # Handle stable official U-Boot versions
 TI_K3_R5_LOADER_SITE = https://ftp.denx.de/pub/u-boot