[MIPS] Cobalt: Qube1 has no serial port so don't use it

Because Qube1 doesn't have a serial chip waiting for transmit fifo empty
takes forever, which isn't a good idea. No prom_putchar/early console
for Qube1 fixes this.
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: NYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/cobalt/console.c

@@ -4,10 +4,15 @@
 #include <linux/io.h>
 #include <linux/serial_reg.h>
 
+#include <cobalt.h>
+
 #define UART_BASE	((void __iomem *)CKSEG1ADDR(0x1c800000))
 
 void prom_putchar(char c)
 {
+	if (cobalt_board_id <= COBALT_BRD_ID_QUBE1)
+		return;
+
 	while (!(readb(UART_BASE + UART_LSR) & UART_LSR_THRE))
 		;