drm/imx: imx-tve: Make use of the helper function devm_platform_ioremap_resource()

Use the devm_platform_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource()
separately

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210831135553.4426-1-caihuoqing@baidu.com


Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>