arch/ia64/setup: Drop dummy_con initialization

con_init in tty/vt.c will now set conswitchp to dummy_con if it's unset.
Drop it from arch setup code.
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20191218214506.49252-10-nivedita@alum.mit.eduSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/ia64/kernel/setup.c

@@ -608,9 +608,6 @@ setup_arch (char **cmdline_p)
 
 #ifdef CONFIG_VT
 	if (!conswitchp) {
-# if defined(CONFIG_DUMMY_CONSOLE)
-		conswitchp = &dummy_con;
-# endif
 # if defined(CONFIG_VGA_CONSOLE)
 		/*
 		 * Non-legacy systems may route legacy VGA MMIO range to system