x86/gart: Replace printk() with pr_info()

Replace printk() with pr_info(), pr_err(), etc.  Define pr_fmt() to prefix
output with "AGP: ".

No functional change except the addition of "AGP: " prefix in dmesg output.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
1 file changed