[Buildroot] [PATCH 2/2] linux: support Image.gz on arm64 and riscv

[Thomas Petazzoni <thomas.petazzoni@bootlin.com>]

Both arm64 and riscv allow generating a compressed Image.gz file, so
let's support that as a first class citizen.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
---
 linux/Config.in | 4 ++++
 linux/linux.mk  | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/linux/Config.in b/linux/Config.in
index 9f2af6da5b..73b9c30b26 100644
--- a/linux/Config.in
+++ b/linux/Config.in
@@ -262,6 +262,10 @@ config BR2_LINUX_KERNEL_IMAGE
 	bool "Image"
 	depends on BR2_aarch64 || BR2_riscv
 
+config BR2_LINUX_KERNEL_IMAGE_GZ
+	bool "Image.gz"
+	depends on BR2_aarch64 || BR2_riscv
+
 config BR2_LINUX_KERNEL_LINUX_BIN
 	bool "linux.bin"
 	depends on BR2_microblaze
diff --git a/linux/linux.mk b/linux/linux.mk
index e07e014d1e..133023f78c 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
@@ -201,6 +201,8 @@ else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
 LINUX_IMAGE_NAME = simpleImage.$(firstword $(LINUX_DTS_NAME))
 else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
 LINUX_IMAGE_NAME = Image
+else ifeq ($(BR2_LINUX_KERNEL_IMAGE_GZ),y)
+LINUX_IMAGE_NAME = Image.gz
 else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
 LINUX_IMAGE_NAME = linux.bin
 else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
-- 
2.26.2