Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 27a4bab..e765743 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -78,7 +78,7 @@
 
 /*
  * Returns the location of the fragment from
- * the begining of the filesystem.
+ * the beginning of the filesystem.
  */
 
 static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock)