sh: Update SE7712 PCLK definition.

This patch provides a correct value for CONFIG_SH_PCLK_FREQ for the
SH7712 solution engine when used with the board's default factory
settings. This results in the board running at its maximum CPU clock
rate (200 MHz).
Signed-off-by: NAndrew Murray <amurray@mpc-data.co.uk>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/configs/se7712_defconfig

@@ -237,7 +237,7 @@ CONFIG_CPU_HAS_SR_RB=y
 CONFIG_SH_TMU=y
 CONFIG_SH_TIMER_IRQ=16
 # CONFIG_NO_IDLE_HZ is not set
-CONFIG_SH_PCLK_FREQ=33333333
+CONFIG_SH_PCLK_FREQ=66666666
 
 #
 # CPU Frequency scaling