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]

lib/sha256.c

@@ -293,7 +293,7 @@ void sha256_csum_wd(const unsigned char *input, unsigned int ilen,
 			chunk = chunk_sz;
 		sha256_update(&ctx, curr, chunk);
 		curr += chunk;
-		WATCHDOG_RESET();
+		schedule();
 	}
 #else
 	sha256_update(&ctx, input, ilen);