[U-Boot] Small default of 8MB for CONFIG_SYS_BOOTM_LEN

[Alexander Holler]

Hello,

is there a reason why CONFIG_SYS_BOOTM_LEN is defined to 8MB by default?

I've build me a kernel containing a small initramfs (just busybox and 
some modules) and already hit that limit (for having a bootable kernel 
which doesn't need anything else).

If raising that limit doesn't consume any memory, I would like it to 
have something around 16MB or even larger. That would eleminate the need 
to rebuild u-boot just for such a use case.

Regards,

Alexander