arm/dt: Correct the max SPI clock rate in MSM Copper

The MSM Copper allows for a maximum clock rate of
25 MHz (not 24) at low Vdd on the SPI core clock.
Use this rate.

Change-Id: I4a8dc88b1b0e477765fb19bdfca10d97946f45d0
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
1 file changed