drm/i915/bmg: Read display register timeout

Log the address of the register that caused the timeout
interrupt by reading RMTIMEOUTREG_CAPTURE

--v2:
- Update RMTIMEOUTREG_CAPTURE naming (Suraj)

--v3:
- XeLpdp naming convention.
- Use if condition instead of else if

Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240807142106.1270213-1-mitulkumar.ajitkumar.golani@intel.com