This patch correctly sets the oobavail variable
and fixes a bug where the oob data was not valid when
there where multiple groups in oobfree.

First segment fixes a typo
Second segment fixes a bug where oob data may be copied incorrectly.
Third segment adds an error message when exiting due to write protect.
Forth segment fixes a bug where oobavail may be set incorrectly.
Signed-off-by: NTroy Kisky <troy.kisky@boundarydevices.com>