Fix spelling mistakes in comments

milisecond -> millisecond
 meassge -> message

Cc: Kalle Valo <kvalo@adurom.com>
Cc: Jiri Kosina <trivial@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/acpi/apei/erst.c

@@ -53,7 +53,7 @@
 				     sizeof(struct acpi_table_erst)))
 
 #define SPIN_UNIT		100			/* 100ns */
-/* Firmware should respond within 1 miliseconds */
+/* Firmware should respond within 1 milliseconds */
 #define FIRMWARE_TIMEOUT	(1 * NSEC_PER_MSEC)
 #define FIRMWARE_MAX_STALL	50			/* 50us */