drm/xe: Remove xe_ prefix in static functions names

Used magic script to rename static functions xe_X to X except for: xe_vm_bind, xe_dma_buf_attach, xe_dma_buf_detach, xe_dma_buf_pin, xe_dma_buf_unpin, xe_dma_buf_begin_cpu_access, xe_dma_buf_move_notify, xe_ttm_tt_create, xe_ttm_tt_populate, xe_ttm_tt_unpopulate, xe_ttm_tt_destroy, xe_irq_handler

Signed-off-by: Francois Dugast francois.dugast@intel.com