allow lz4 commpression for x86_64

target/linux/config/Config.in.compression

@@ -89,7 +89,9 @@ config ADK_KERNEL_COMP_LZ4
 	select ADK_KERNEL_RD_LZ4
 	select ADK_KERNEL_KERNEL_LZ4
 	select ADK_KERNEL_INITRAMFS_COMPRESSION_LZ4
-	depends on ADK_TARGET_ARCH_X86 || ADK_TARGET_ARCH_ARM
+	depends on ADK_TARGET_ARCH_ARM \
+		|| ADK_TARGET_ARCH_X86 \
+		|| ADK_TARGET_ARCH_X86_64
 	depends on ADK_TARGET_KERNEL_WITH_COMPRESSION \
 		|| ADK_TARGET_GENERIC