[PATCH] nand wait timeout fix

Wed Nov 3 07:38:58 EDT 2010

nand_wait_ready timeout should not depends of HZ value.
panic_nand_wait take an relative timeout, not a absolute one.
warn if nand_wait exit while the nand is still busy.

Signed-off-by: Matthieu CASTET <matthieu.castet at parrot.com>
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