sh: Set pclk default for SH7705.

CPU sub-types set the pclk default in Kconfig, add one
for SH7705.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -377,7 +377,7 @@ config SH_PCLK_FREQ
 	default "50000000" if CPU_SUBTYPE_SH7750 || CPU_SUBTYPE_SH7780
 	default "60000000" if CPU_SUBTYPE_SH7751
 	default "33333333" if CPU_SUBTYPE_SH7300 || CPU_SUBTYPE_SH7770 || \
-			      CPU_SUBTYPE_SH7760
+			      CPU_SUBTYPE_SH7760 || CPU_SUBTYPE_SH7705
 	default "27000000" if CPU_SUBTYPE_SH73180 || CPU_SUBTYPE_SH7343
 	default "66000000" if CPU_SUBTYPE_SH4_202
 	help