drm/msm: Replace type of paddr to uint32_t.

This patch helps to avoid the following build issue:

drivers/gpu/drm/msm/msm_fbdev.c:108:2: error: passing argument 3 of 'msm_gem_get_iova_locked' from incompatible pointer type [-Werror]
   msm_gem_get_iova_locked(fbdev->bo, 0, &paddr);
   ^
In file included from drivers/gpu/drm/msm/msm_fbdev.c:18:0:
drivers/gpu/drm/msm/msm_drv.h:153:5: note: expected 'uint32_t *' but argument is of type 'dma_addr_t *'
  int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id,
      ^
Signed-off-by: Matwey V. Kornilov <matwey@sai.msu.ru>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/msm_fbdev.c

@@ -59,7 +59,7 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
 	struct drm_framebuffer *fb = NULL;
 	struct fb_info *fbi = NULL;
 	struct drm_mode_fb_cmd2 mode_cmd = {0};
-	dma_addr_t paddr;
+	uint32_t paddr;
 	int ret, size;
 
 	sizes->surface_bpp = 32;