mb/emulation/qemu-i440fx,q35: Fix comment style

The comment fits in 96 characters, so do it, also getting rid of the
unwanted multi-line comment style.

Add a dot/period to the end of the sentence.

Change-Id: I7b5c7ea5da00d649aa06361e0e0cf2431874a6ec
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42615
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/mainboard/emulation/qemu-i440fx/mainboard.c b/src/mainboard/emulation/qemu-i440fx/mainboard.c
index 04bbb7d..929743a 100644
--- a/src/mainboard/emulation/qemu-i440fx/mainboard.c
+++ b/src/mainboard/emulation/qemu-i440fx/mainboard.c
@@ -20,9 +20,7 @@
 	for (i = 0; i < 6; i++)
 	pci_write_config8(dev, 0x5a + i, 0x33);
 
-	/* This sneaked in here, because Qemu does not
-	 * emulate a SuperIO chip
-	 */
+	/* This sneaked in here, because Qemu does not emulate a SuperIO chip. */
 	pc_keyboard_init(NO_AUX_DEVICE);
 
 	/* setup IRQ routing */