linux: support uncompressed kernel on S390

Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

linux/Config.in

@@ -329,6 +329,10 @@ config BR2_LINUX_KERNEL_XZ
 config BR2_LINUX_KERNEL_ZSTD
 	bool "zstd compression"
 
+config BR2_LINUX_KERNEL_UNCOMPRESSED
+	bool "uncompressed"
+	depends on BR2_s390x
+
 endchoice
 
 config BR2_LINUX_KERNEL_IMAGE_TARGET_NAME

linux/linux.mk

@@ -111,6 +111,7 @@ LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) += CONFIG_KERNEL_LZMA
 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) += CONFIG_KERNEL_LZO
 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) += CONFIG_KERNEL_XZ
 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_ZSTD) += CONFIG_KERNEL_ZSTD
+LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_UNCOMPRESSED) += CONFIG_KERNEL_UNCOMPRESSED
 
 ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL),y)
 LINUX_DEPENDENCIES += host-openssl