[U-Boot] sf: fix timebase data type in _wait_ready()

[Tom Rini]

On Mon, Apr 04, 2016 at 11:03:52AM -0600, Stephen Warren wrote:

> From: Stephen Warren <swarren at nvidia.com>
> 
> get_timer() returns an unsigned 64-bit value, but is currently assigned to
> a signed 32-bit variable. Due to sign extension and data truncation, this
> causes the timeout loop in spi_flash_cmd_wait_ready() to immediately (and
> incorrectly) fire for about 50% of all time values, based on whether bit
> 31 is set. In sandbox at least, this causes the test to pass or fail based
> on system uptime, as opposed to time since the U-Boot binary was started.
> 
> Fixes: 4efad20a1751 ("sf: Update status reg check in spi_flash_cmd_wait_ready")
> Signed-off-by: Stephen Warren <swarren at nvidia.com>
> Reviewed-by: Tom Rini <trini at konsulko.com>
> Reviewed-by: Jagan Teki <jteki at openedev.com>

Applied to u-boot/master, thanks!

-- 
Tom
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