Max Filippov 9ed82c6866 xtensa: implement ndelay ...

Proper ndelay implementation allows for faster IO rate with drivers that
use ndelay to access their device registers, as otherwise ndelay is
emulated with udelay.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

2014-01-15 00:28:11 +04:00

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