Fix issue of using "simply" as a noun

Author: CollieIsCute

lkmpg.tex

@@ -1294,7 +1294,7 @@ \section{sysfs: Interacting with your module}
 Attributes can be exported for kobjects in the form of regular files in the filesystem.
 Sysfs forwards file I/O operations to methods defined for the attributes, providing a means to read and write kernel attributes.
 
-An attribute definition in simply:
+A simple attribute definition:
 
 \begin{code}
 struct attribute {