cyclic: Use schedule() instead of WATCHDOG_RESET()

Globally replace all occurances of WATCHDOG_RESET() with schedule(),
which handles the HW_WATCHDOG functionality and the cyclic
infrastructure.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Tom Rini <trini@konsulko.com> [am335x_evm, mx6cuboxi, rpi_3,dra7xx_evm, pine64_plus, am65x_evm, j721e_evm]
diff --git a/arch/powerpc/lib/cache.c b/arch/powerpc/lib/cache.c
index 1916251..c4c5c2d 100644
--- a/arch/powerpc/lib/cache.c
+++ b/arch/powerpc/lib/cache.c
@@ -13,7 +13,7 @@
 {
 	flushed += CONFIG_SYS_CACHELINE_SIZE;
 	if (flushed >= CONFIG_CACHE_FLUSH_WATCHDOG_THRESHOLD) {
-		WATCHDOG_RESET();
+		schedule();
 		flushed = 0;
 	}
 	return flushed;