src/include: Wrap lines at 80 columns

Fix the following warning detected by checkpatch.pl:

WARNING: line over 80 characters

Changed a few comments to reduce line length.  File
src/include/cpu/amd/vr.h was skipped.

TEST=Build and run on Galileo Gen2

Change-Id: Ie3c07111acc1f89923fb31135684a6d28a505b61
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18687
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/include/device/pci_ehci.h

@@ -21,7 +21,7 @@
 #include <device/device.h>
 
 #define EHCI_BAR_INDEX		0x10
-#define PCI_EHCI_CLASSCODE	0x0c0320	/* USB2.0 with EHCI controller */
+#define PCI_EHCI_CLASSCODE	0x0c0320  /* USB2.0 with EHCI controller */
 
 pci_devfn_t pci_ehci_dbg_dev(unsigned int hcd_idx);
 u8 *pci_ehci_base_regs(pci_devfn_t dev);