drm/i915: Switch to using pci_iounmap in conjunction with pci_iomap
drm/i915: Switch to using pci_iounmap in conjunction with pci_iomap

After switching the MMIO registers to use pci_iomap, remember to dispose
of the mapping with pci_iounmap (for symmetry).

Signed-off-by: Chris Wilson <711c73f64afdce07b7e38039a96d2224209e9a6c@chris-wilson.co.uk>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs