Bigger boot block size?

[Jung-uk Kim]

I have been working on boot2 recently.  I faced constant problem with 
boot2 size limitation.  Can we have bigger boot block size (aka 
BBSIZE)?  In the future, we may have to support different file system 
to boot from and we won't have any space to add the support without 
dropping UFS1 support.  In fact, I am using 32-sector boot block and 
I don't see any problem so far.  The patch that I've been using is 
attached.

Cheers,

Jung-uk Kim
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