zlib: Add further watchdog reset calls

Patch 253cb831 [zlib: add watchdog reset call] added already a few
watchdog reset calls to the new zlib U-Boot port. But on some boards
this is not enough. Additional calls are needed on boards with
short watchdog timeouts.

This was detected and tested on the lwmon5 board with a very short
watchdog timeout. Without this patch, the board resets during Linux
kernel decompression. With it, the decompression succeeds.
Signed-off-by: NStefan Roese <sr@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
Acked-by: NDetlev Zundel <dzu@denx.de>

lib/zlib.c

@@ -1599,6 +1599,7 @@ int flush;
             strm->adler = state->check = adler32(0L, Z_NULL, 0);
             state->mode = TYPE;
         case TYPE:
+	    WATCHDOG_RESET();
             if (flush == Z_BLOCK) goto inf_leave;
         case TYPEDO:
             if (state->last) {