Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index 8d62fb7..a3755ff 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -1488,7 +1488,7 @@
 
 	outb(key, io);
 	outb(key, io);     /* Write Magic Sequence to EFER, extended
-			      funtion enable register */
+			      function enable register */
 	outb(0x20, io);    /* Write EFIR, extended function index register */
 	devid = inb(io + 1);  /* Read EFDR, extended function data register */
 	outb(0x21, io);
@@ -1527,7 +1527,7 @@
 	x_oldid = inb(io + 2);
 
 	outb(key, io);     /* Write Magic Byte to EFER, extended
-			      funtion enable register */
+			      function enable register */
 	outb(0x20, io + 2);  /* Write EFIR, extended function index register */
 	devid = inb(io + 2);  /* Read EFDR, extended function data register */
 	outb(0x21, io + 1);
@@ -1569,7 +1569,7 @@
 
 	outb(key, io);
 	outb(key, io);     /* Write Magic Sequence to EFER, extended
-			      funtion enable register */
+			      function enable register */
 	outb(0x0d, io);    /* Write EFIR, extended function index register */
 	oldid = inb(io + 1);  /* Read EFDR, extended function data register */
 	outb(0x0e, io);