fix typo on up_udelay
* Description:
* Delay inline for the requested number of microseconds. NOTE: Because
* of all of the setup, several microseconds will be lost before the actual
- * timing looop begins. Thus, the delay will always be a few microseconds
+ * timing loop begins. Thus, the delay will always be a few microseconds
* longer than requested.
*
* *** NOT multi-tasking friendly ***
