The rg21s fails to boot if the kernel is larger than about
2,376 KiB. The ra21s is virtually identical hardware.
Enabling lzma-loader resolves the issue on both the rg21s
and ra21s (see FS#3057 on the issue tracker).
Fixes: FS#3057
Signed-off-by: Furkan Alaca <furkan.alaca@queensu.ca>
541faf2c93