fix: defconfig: Use correct KERNEL_IMAGE_TARGET_NAME

Author: tuxuser

configs/xbox360_defconfig

@@ -13,10 +13,11 @@ BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_GIT=y
 BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/rwf93/linux"
 BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="xenon-5.17"
+BR2_LINUX_KERNEL_USE_DEFCONFIG=y
 BR2_LINUX_KERNEL_DEFCONFIG="xenon"
 BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM=y
-BR2_LINUX_KERNEL_IMAGE_TARGET_NAME="xenon"
-BR2_LINUX_KERNEL_IMAGE_NAME="zImage.xenon"
+BR2_LINUX_KERNEL_IMAGE_TARGET_NAME="zImage.xenon"
+BR2_LINUX_KERNEL_IMAGE_NAME=""
 BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
 BR2_PACKAGE_GIT=y
 BR2_PACKAGE_PCIUTILS=y