imx8mm_evk: Increase CONFIG_SYS_BOOTM_LEN to 64MB

The BSP platform LmP supports the board NXP iMX8M Mini EVK. The
kernel size in LmP exceeds 32Mb. Increase the maximum size
of an uncompressed kernel to fix the following error:
    Uncompressing Kernel Image
    Error: inflate() returned -5
    Image too large: increase CONFIG_SYS_BOOTM_LEN
    Must RESET board to recover

Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
1 file changed