Nokia RX-51: Enable CONFIG_CONSOLE_MUX

After this change both device display and serial console would contain
U-Boto output automatically without any future configuration. This would
allow easier debugging on real device as access to serial console is hard
and also in qemu emulator where it is easier to copy+paste from serial
console as from SDL framebuffer.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/configs/nokia_rx51_defconfig b/configs/nokia_rx51_defconfig
index 13bb6d0..fc92c3a 100644
--- a/configs/nokia_rx51_defconfig
+++ b/configs/nokia_rx51_defconfig
@@ -7,7 +7,7 @@
 CONFIG_BOOTDELAY=30
 CONFIG_USE_PREBOOT=y
 CONFIG_PREBOOT="run preboot"
-# CONFIG_CONSOLE_MUX is not set
+CONFIG_CONSOLE_MUX=y
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="Nokia RX-51 # "
diff --git a/include/configs/nokia_rx51.h b/include/configs/nokia_rx51.h
index dd3b8ea..a9a0b1c 100644
--- a/include/configs/nokia_rx51.h
+++ b/include/configs/nokia_rx51.h
@@ -119,9 +119,9 @@
 /* Environment information */
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"usbtty=cdc_acm\0" \
-	"stdin=vga\0" \
-	"stdout=vga\0" \
-	"stderr=vga\0" \
+	"stdin=serial,vga\0" \
+	"stdout=serial,vga\0" \
+	"stderr=serial,vga\0" \
 	"setcon=setenv stdin ${con};" \
 		"setenv stdout ${con};" \
 		"setenv stderr ${con}\0" \