Remove dead code, extract (>>|) operator

Signed-off-by: David Scott <dave.scott@citrix.com>
MemoryIO: constrain to V1_LWT.BLOCK

Signed-off-by: David Scott <dave.scott@citrix.com>
Use Mbr_partition, and read sectors from the BLOCK for upload

So we have
  MemoryIO -> Mbr_partition -> Fat.Fs

Signed-off-by: David Scott <dave.scott@citrix.com>
Regenerate OASIS

Signed-off-by: David Scott <dave.scott@citrix.com>