h8300: Use generic config PREEMPT definition

So that it can handle the new CONFIG_PREEMPT_COUNT.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
diff --git a/arch/h8300/Kconfig.cpu b/arch/h8300/Kconfig.cpu
index d236ab4..15c2228 100644
--- a/arch/h8300/Kconfig.cpu
+++ b/arch/h8300/Kconfig.cpu
@@ -162,9 +162,7 @@
 	int "TPU channel"
 	depends on H8300_TPU
 
-config PREEMPT
-	bool "Preemptible Kernel"
-	default n
+source "kernel/Kconfig.preempt"
 
 source "mm/Kconfig"