serial: liteuart: fix MODULE_ALIAS

modprobe can't handle spaces in aliases.

Fixes: 1da81e5562 ("drivers/tty/serial: add LiteUART driver")
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Link: https://lore.kernel.org/r/20220104131030.1674733-1-hi@alyssa.is
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/liteuart.c

@@ -436,4 +436,4 @@ module_exit(liteuart_exit);
 MODULE_AUTHOR("Antmicro <www.antmicro.com>");
 MODULE_DESCRIPTION("LiteUART serial driver");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform: liteuart");
+MODULE_ALIAS("platform:liteuart");