flash/nor/numicro: Use 'bool' data type

Change-Id: Ib4ee64dec9c1253ae45bc58e9f175ab36964180a
Signed-off-by: Marc Schink <dev@zapb.de>
Reviewed-on: http://openocd.zylin.com/6162
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

src/flash/nor/numicro.c

@@ -1132,7 +1132,7 @@ static const struct numicro_cpu_type NuMicroParts[] = {
 /* Private bank information for NuMicro. */
 struct  numicro_flash_bank {
 	struct working_area *write_algorithm;
-	int probed;
+	bool probed;
 	const struct numicro_cpu_type *cpu;
 };