* Add assembly optimised variants for memcpy, memset and find_first_set_bit
* Add option to map_address in MMU to set caching algorithm
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19920 a1c6a512-1295-4272-9138-f99709370657
* Get USB working (it isn't good at writing support though)
* Clean up NAND & SD a bit
* Other comments/fixes
Ingenic Jz4740/MIPS:
* Split MMU from system
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19815 a1c6a512-1295-4272-9138-f99709370657