OMAP: VRAM: Fix boot-time memory allocation

Use memblock_free() and memblock_remove() to remove the allocated or
reserved VRAM area from normal kernel memory.

This is a slightly modified version of patches from Felipe Contreras and
Namhyung Kim.

Reported-by: Felipe Contreras <[e-mail]>
Reported-by: Namhyung Kim <[e-mail]>
Signed-off-by: Tomi Valkeinen <[e-mail]>
Signed-off-by: Paul Mundt <[e-mail]>

drivers/video/omap2/vram.c

···
 			return;
 		}
 	} else {
-		paddr = memblock_alloc_base(size, PAGE_SIZE, MEMBLOCK_REAL_LIMIT);
+		paddr = memblock_alloc(size, PAGE_SIZE);
 	}
+
+	memblock_free(paddr, size);
+	memblock_remove(paddr, size);
 
 	omap_vram_add_region(paddr, size);