zynq: Convert arm twd timer to DM driver

Move arm twd timer driver from zynq to generic location.

DM timer drivers are designed differently to original driver. Timer is
counting up and not down.
Information about clock rates are find out in timer_pre_probe() that's
why there is no need to get any additional information from DT in the
driver itself (only register offset).

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Link: https://lore.kernel.org/r/20220805061629.1207-1-stefan.herbrechtsmeier-oss@weidmueller.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
index 4049290..1b49236 100644
--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -73,6 +73,12 @@
 	  usually at least one of them exists. Either of them is supported
 	  in U-Boot.
 
+config ARM_TWD_TIMER
+	bool "ARM timer watchdog (TWD) timer support"
+	depends on TIMER && CLK
+	help
+	  Select this to enable support for the ARM global timer watchdog timer.
+
 config AST_TIMER
 	bool "Aspeed ast2400/ast2500 timer support"
 	depends on TIMER