[U-Boot] p1_p2_rdb: Fix unused variable warning

[Tom Rini]

On Tue, Apr 18, 2017 at 10:26:35PM -0400, Tom Rini wrote:

> With gcc-6 we see a warning that sysclk_tbl is defined but unused, so
> remove it.
> 
> Cc: York Sun <york.sun at nxp.com>
> Signed-off-by: Tom Rini <trini at konsulko.com>
> Reviewed-by: York Sun <york.sun at nxp.com>

Applied to u-boot/master, thanks!

-- 
Tom
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