sh: Fix up the timer IRQ definition for SH7203.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -580,6 +580,7 @@ config SH_TIMER_IRQ
 			CPU_SUBTYPE_SH7763
 	default "86" if CPU_SUBTYPE_SH7619
 	default "140" if CPU_SUBTYPE_SH7206
+	default "142" if CPU_SUBTYPE_SH7203
 	default "16"
 
 config SH_PCLK_FREQ