drm/hisilicon/kirin: Use drm_gem_fb_create()

drm/hisilicon/kirin: Use drm_gem_fb_create()

drm_fb_cma_create() is just a wrapper around drm_gem_fb_create() now,
so use the function directly.

Cc: Xinliang Liu <[email protected]>
Cc: Rongrong Zou <[email protected]>
Cc: Xinwei Kong <[email protected]>
Cc: Chen Feng <[email protected]>
Signed-off-by: Noralf Trønnes <[email protected]>
Reviewed-by: Xinliang Liu <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]