--enable-small builds only the resumable mode of the LZMA decoder and a
single-table CRC32/CRC64 without the architecture-specific CRC code.
Keep it for SMALL_FLASH targets and build the fast variants elsewhere.
xz -dc -T1 of a 32 MiB file (3.3 MiB .xz), median of 5: 966 -> 880 ms
on Cortex-A53, 813 -> 634 ms on Cortex-A72 in AArch32. liblzma grows by
11.5 KiB (aarch64) to 19.6 KiB (mips_24kc), compressed with xz.
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Julius Bairaktaris <julius@bairaktaris.de>