Turris 1.x kernel has invalid format
Booting latest master on Turris 1.x results to:
=> boot
BOOT NAND
reading zImage
3330788 bytes read in 170 ms (18.7 MiB/s)
wdt status 00000003
reading fdt
13143 bytes read in 14 ms (916 KiB/s)
WARNING: adjusting available memory to 30000000
## Booting kernel from Legacy Image at 02100000 ...
Image Name: Linux-4.19.56
Created: 2019-07-01 0:02:57 UTC
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 3330724 Bytes = 3.2 MiB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at 02000000
Booting using the fdt blob at 0x2000000
Uncompressing Kernel Image ... Error: Bad gzipped data
gzip compressed: uncompress error -1
Must RESET board to recover
This is most probably just an invalid format of kernel. We should fix that in turris1x-support
package.