clocksource/drivers/npcm: Add NPCM7xx timer driver

Add Nuvoton BMC NPCM7xx timer driver.

The clocksource Enable 24-bit TIMER0 and TIMER1 counters,
while TIMER0 serve as clockevent and TIMER1 serve as clocksource.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Reviewed-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

drivers/clocksource/Kconfig

@@ -130,6 +130,14 @@ config VT8500_TIMER
 	help
 	  Enables support for the VT8500 driver.
 
+config NPCM7XX_TIMER
+	bool "NPCM7xx timer driver" if COMPILE_TEST
+	depends on HAS_IOMEM
+	select CLKSRC_MMIO
+	help
+	  Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
+	  While TIMER0 serves as clockevent and TIMER1 serves as clocksource.
+
 config CADENCE_TTC_TIMER
 	bool "Cadence TTC timer driver" if COMPILE_TEST
 	depends on COMMON_CLK