media: platform: omap: Pass a pointer to virt_to_page()

A pointer into virtual memory is represented by a (void *)
not an u32, so the compiler warns:

drivers/media/platform/ti/omap/omap_voutlib.c:317:54: warning:
  passing argument 1 of 'virt_to_pfn' makes pointer from integer
  without a cast [-Wint-conversion]

Fix this with an explicit cast.

Cc: Vaibhav Hiremath <hvaibhav.linux@gmail.com>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/ti/omap/omap_voutlib.c

@@ -314,7 +314,7 @@ unsigned long omap_vout_alloc_buffer(u32 buf_size, u32 *phys_addr)
 
 	if (virt_addr) {
 		while (size > 0) {
-			SetPageReserved(virt_to_page(addr));
+			SetPageReserved(virt_to_page((void *)addr));
 			addr += PAGE_SIZE;
 			size -= PAGE_SIZE;
 		}
@@ -335,7 +335,7 @@ void omap_vout_free_buffer(unsigned long virtaddr, u32 buf_size)
 	order = get_order(size);
 
 	while (size > 0) {
-		ClearPageReserved(virt_to_page(addr));
+		ClearPageReserved(virt_to_page((void *)addr));
 		addr += PAGE_SIZE;
 		size -= PAGE_SIZE;
 	}