Input: i8042 - fix warning on non-x86 builds

Commit c18bab80 ("Input: i8042 - non-x86 build fix") introduced the
following warning on non-x86 builds:

    drivers/input/serio/i8042.c: In function 'i8042_probe':
    drivers/input/serio/i8042.c:1154: warning: unused variable 'param'

Fix this by moving the parameter variable declaration into the #ifdef too.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/serio/i8042.c

@@ -1151,7 +1151,6 @@ static int __devinit i8042_setup_kbd(void)
 static int __devinit i8042_probe(struct platform_device *dev)
 {
 	int error;
-	char param;
 
 	error = i8042_controller_selftest();
 	if (error)
@@ -1174,7 +1173,7 @@ static int __devinit i8042_probe(struct platform_device *dev)
 	}
 #ifdef CONFIG_X86
 	if (i8042_dritek) {
-		param = 0x90;
+		char param = 0x90;
 		error = i8042_command(&param, 0x1059);
 		if (error)
 			goto out_fail;