fbdev: gbefb: fix to use physical address instead of dma address

While debuggigng why X would not start on mips64 Sgi/O2 I found the
phys adress being off. Turns out the gbefb passed the internal
dma_addr as phys. May be broken pre git history. Fix by converting
dma_to_phys.

Signed-off-by: René Rebe <[e-mail]>
Cc: <[e-mail]> # v4.0+
Signed-off-by: Helge Deller <[e-mail]>

drivers/video/fbdev/gbefb.c

···
 #include <linux/delay.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
+#include <linux/dma-direct.h>
 #include <linux/errno.h>
 #include <linux/gfp.h>
 #include <linux/fb.h>
···
 static unsigned int gbe_mem_size = CONFIG_FB_GBE_MEM * 1024*1024;
 static void *gbe_mem;
 static dma_addr_t gbe_dma_addr;
-static unsigned long gbe_mem_phys;
+static phys_addr_t gbe_mem_phys;
 
 static struct {
 	uint16_t *cpu;
···
 			goto out_release_mem_region;
 		}
 
-		gbe_mem_phys = (unsigned long) gbe_dma_addr;
+		gbe_mem_phys = dma_to_phys(&p_dev->dev, gbe_dma_addr);
 	}
 
 	par = info->par;