media: ti: vpe: #include <linux/platform_device.h> explicitly

media: ti: vpe: #include <linux/platform_device.h> explicitly

The driver uses several symbols and structs defined in that header. The
header is currently included transitively via

	"vip.h" ->
	<media/v4l2-ctrls.h> ->
	<media/media-request.h> ->
	<media/media-device.h> ->
	<linux/platform_device.h>

which seems to be on the lower end of the scale between random and
reliable.

Acked-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Yemike Abhilash Chandra <y-abhilashchandra@ti.com>
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://patch.msgid.link/9f2e0e001eec087f00ac2c5af2de2e8f6d0978c1.1782808461.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>