Increase allowable image size from 8MB to 32MB

CONFIG_SYS_BOOTM_LEN limits the size of the uncompressed kernel image to
8MB by default. Today, our image is 19MB in size when de-compressed.
This currently does not matter because lzmaBuffToBuffDecompress()
ignores this limit. However, this is going to change in a later commit.

Change-Id: Ia3bc0e58ed07afffbd72a9d0eeb70e1376e7ab4b
1 file changed