fbdev: kyro: Add missing PCI memory region request

The kyro framebuffer driver did not request its PCI memory regions,
which could lead to conflicts with other drivers.  This change
addresses the task "Request memory regions in all fbdev drivers"
from the file Documentation/gpu/todo.rst.

This is addressed by using the managed device functions pcim_enable_device()
and pcim_request_all_regions(). This simplifies the code by making error
handling and driver removal cleanup automatic for these resources.

Signed-off-by: Giovanni Di Santi <giovanni.disanti.lkl@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>