PM / VT: Cleanup #if defined uglyness and fix compile error

Introduce the config option CONFIG_VT_CONSOLE_SLEEP in order to cleanup
the #if defined ugliness for the vt suspend support functions. Note that
CONFIG_VT_CONSOLE is already dependant on CONFIG_VT.

The function pm_set_vt_switch is actually dependant on CONFIG_VT and not
CONFIG_PM_SLEEP. This fixes a compile error when CONFIG_PM_SLEEP is
not set:

drivers/tty/vt/vt_ioctl.c:1794: error: redefinition of 'pm_set_vt_switch'
include/linux/suspend.h:17: error: previous definition of 'pm_set_vt_switch' was here

Also, remove the incorrect path from the comment in console.c.

[rjw: Replaced #if defined() with #ifdef in suspend.h.]

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/kernel/power/console.c b/kernel/power/console.c
index 218e5af..b1dc456 100644
--- a/kernel/power/console.c
+++ b/kernel/power/console.c
@@ -1,5 +1,5 @@
 /*
- * drivers/power/process.c - Functions for saving/restoring console.
+ * Functions for saving/restoring console.
  *
  * Originally from swsusp.
  */
@@ -10,7 +10,6 @@
 #include <linux/module.h>
 #include "power.h"
 
-#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
 #define SUSPEND_CONSOLE	(MAX_NR_CONSOLES-1)
 
 static int orig_fgconsole, orig_kmsg;
@@ -32,4 +31,3 @@
 		vt_kmsg_redirect(orig_kmsg);
 	}
 }
-#endif