[openwrt/openwrt] ipq40xx: use zImage for GL.iNet GL-B1300, GL-S1300 to shrink below 4096k

[LEDE Commits]

chunkeey pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/81d694e30b4926fea057bd3e46d996a8f098b95a

commit 81d694e30b4926fea057bd3e46d996a8f098b95a
Author: Szabolcs Hubai <szab.hu at gmail.com>
AuthorDate: Sun Oct 10 01:32:30 2021 +0200

    ipq40xx: use zImage for GL.iNet GL-B1300, GL-S1300 to shrink below 4096k
    
    In the "ipq40xx: switch to Kernel 5.10" discussion at GitHub,
    Adrian noted [0] that these GL.iNet Conexa series devices,
    GL-B1300 and GL-S1300 failed their image generation [1] as their gzipped
    uImage kernel went above 4096k.
    
    While notifying the vendor about this problem [2], I tested all U-Boot
    releases from GL.iNet:
    - they really fail to boot kernel above 4096k
    - they don't support lzma: "Unimplemented compression type 3"
    - but they boot zImage
    
    Using zImage (xz compression) the kernel is 2909k which is
    more than a megabyte away from the KERNEL_SIZE := 4096k limit.
    
    The gzip compressed version would be 4116k.
    
    [0]: https://github.com/openwrt/openwrt/pull/4620#issuecomment-932765776
    [1]: commit 7b1fa276f5a2 ("ipq40xx: add testing support for kernel 5.10")
    [2]: https://forum.gl-inet.com/t/ipq40xx-kernel-size-and-u-boot-v5-10-is-too-big-for-4-mb/17619
    
    Signed-off-by: Szabolcs Hubai <szab.hu at gmail.com>
---
 target/linux/ipq40xx/image/generic.mk | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/linux/ipq40xx/image/generic.mk b/target/linux/ipq40xx/image/generic.mk
index 18f5d238c7..e0cfa07541 100644
--- a/target/linux/ipq40xx/image/generic.mk
+++ b/target/linux/ipq40xx/image/generic.mk
@@ -495,7 +495,7 @@ endef
 TARGET_DEVICES += glinet_gl-ap1300
 
 define Device/glinet_gl-b1300
-	$(call Device/FitImage)
+	$(call Device/FitzImage)
 	DEVICE_VENDOR := GL.iNet
 	DEVICE_MODEL := GL-B1300
 	BOARD_NAME := gl-b1300
@@ -507,7 +507,7 @@ endef
 TARGET_DEVICES += glinet_gl-b1300
 
 define Device/glinet_gl-s1300
-	$(call Device/FitImage)
+	$(call Device/FitzImage)
 	DEVICE_VENDOR := GL.iNet
 	DEVICE_MODEL := GL-S1300
 	SOC := qcom-ipq4029