socfpga_cyclone5.h: fix kernel console argument in default environment

With fresh environment the kernel gets wrong console
argument and boots without console output. Fix it.

Reported-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Marek Vasut <marex@denx.de>

include/configs/socfpga_cyclone5.h

@@ -42,7 +42,7 @@
 /* Booting Linux */
 #define CONFIG_BOOTDELAY	3
 #define CONFIG_BOOTFILE		"zImage"
-#define CONFIG_BOOTARGS		"console=ttyS0" __stringify(CONFIG_BAUDRATE)
+#define CONFIG_BOOTARGS		"console=ttyS0," __stringify(CONFIG_BAUDRATE)
 #ifdef CONFIG_SOCFPGA_VIRTUAL_TARGET
 #define CONFIG_BOOTCOMMAND	"run ramboot"
 #else