netx: enable GENERIC_TIME

the needed infrastructure is already in place, only selecting
GENERIC_TIME was missing.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/Kconfig

@@ -287,6 +287,7 @@ config ARCH_FOOTBRIDGE
 config ARCH_NETX
 	bool "Hilscher NetX based"
 	select ARM_VIC
+	select GENERIC_TIME
 	help
 	  This enables support for systems based on the Hilscher NetX Soc