sparc64: vcc: Enable VCC module in linux

Enables the Virtual Console Concentrator (VCC) module
in linux kernel

Signed-off-by: Jagannathan Raman <[e-mail]>
Reviewed-by: Liam Merwick <[e-mail]>
Reviewed-by: Shannon Nelson <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

MAINTAINERS

···
 F:	drivers/tty/serial/sunsu.c
 F:	drivers/tty/serial/sunzilog.c
 F:	drivers/tty/serial/sunzilog.h
+F:	drivers/tty/vcc.c
 
 SPARSE CHECKER
 M:	"Christopher Li" <[e-mail]>

arch/sparc/configs/sparc64_defconfig

···
 # CONFIG_CRYPTO_ANSI_CPRNG is not set
 CONFIG_CRC16=m
 CONFIG_LIBCRC32C=m
+CONFIG_VCC=m

drivers/tty/Kconfig

···
 	help
 	  FDC channel number to use for KGDB.
 
+config VCC
+	tristate "Sun Virtual Console Concentrator"
+	depends on SUN_LDOMS
+	help
+	  Support for Sun logical domain consoles.
 endif # TTY

drivers/tty/Makefile

···
 obj-$(CONFIG_GOLDFISH_TTY)	+= goldfish.o
 obj-$(CONFIG_DA_TTY)		+= metag_da.o
 obj-$(CONFIG_MIPS_EJTAG_FDC_TTY) += mips_ejtag_fdc.o
+obj-$(CONFIG_VCC)		+= vcc.o
 
 obj-y += ipwireless/

drivers/tty/vcc.c

···
+/* vcc.c: sun4v virtual channel concentrator
+ *
+ * Copyright (C) 2017 Oracle. All rights reserved.
+ */
+
+#include <linux/module.h>
+
+static int __init vcc_init(void)
+{
+	return 0;
+}
+
+static void __exit vcc_exit(void)
+{
+}
+
+module_init(vcc_init);
+module_exit(vcc_exit);