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/common/dfu.c b/common/dfu.c
index 16bd1ba..9619088 100644
--- a/common/dfu.c
+++ b/common/dfu.c
@@ -101,7 +101,7 @@
 		if (dfu_reinit_needed)
 			goto exit;
 
-		WATCHDOG_RESET();
+		schedule();
 		usb_gadget_handle_interrupts(usbctrl_index);
 	}
 exit: