arm64: a37xx: increase CONFIG_SYS_BOOTM_LEN to 64MB

Increase max gunzip size, required for booting itb recovery images on
uDPU.

Signed-off-by: Vladimir Vid <vladimir.vid@sartura.hr>
[a.heider: adapt to mainline]
Signed-off-by: Andre Heider <a.heider@gmail.com>
1 file changed