find_module:fix a mistake for kernel with modules uncompressed

For kernel with modules uncompressed,dkms find_module()'s command:
find "$1" -name "$2$module_uncompressed_suffix" -o -name "$2$module_suffix" -type f
actually turns out to be:
`find /lib/modules/[kerv] -name [module_name].ko -o -name [module_name].ko -type -f`

the "type -f" is used to include only for regular file, but with the command above,
it only takes effect for the lastest "-name" query,and will get the symbolic files
(are usually the symbolic files for weak_modules in /lib/*/weak-updates directory)
with the first "-name" query by mistake.

For kernel with modules compressed the command turns out to be like:
`find /lib/modules/[kerv] -name [module_name].ko -o -name [module_name].ko.xz -type -f`
All the modules are with suffix ".xz",the first "-name" query actually do nothing so it's
get nothing wrong.

Fix it by adding "-type -f" param after each "-name" query.

dkms.in

@@ -228,7 +228,7 @@ find_module()
 {
     # tree = $1
     # module = $2
-    find "$1" -name "$2$module_uncompressed_suffix" -o -name "$2$module_suffix" -type f
+    find "$1" -name "$2$module_uncompressed_suffix" -type -f -o -name "$2$module_suffix" -type f
     return $?
 }