drivers/base/platform.c: fix small typo in doc

Typo: iwithout -> without.

Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index eb84d9d..869ff8c 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -360,7 +360,7 @@
  *	This function creates a simple platform device that requires minimal
  *	resource and memory management. Canned release function freeing
  *	memory allocated for the device allows drivers using such devices
- *	to be unloaded iwithout waiting for the last reference to the device
+ *	to be unloaded without waiting for the last reference to the device
  *	to be dropped.
  *
  *	This interface is primarily intended for use with legacy drivers