media: ddbridge: fix build warnings

Fix 2 build warnings.
These functions are void, so drop the "return"s.

./drivers/media/pci/ddbridge/ddbridge-io.h: warning: 'return' with a value, in function returning void [enabled by default]:  => 50:2, 55:2

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Daniel Scheller <d.scheller.oss@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/ddbridge/ddbridge-io.h

@@ -47,12 +47,12 @@ static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr)
 
 static inline void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
 {
-	return memcpy_toio(dev->regs + adr, src, count);
+	memcpy_toio(dev->regs + adr, src, count);
 }
 
 static inline void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
 {
-	return memcpy_fromio(dst, dev->regs + adr, count);
+	memcpy_fromio(dst, dev->regs + adr, count);
 }
 
 static inline u32 safe_ddbreadl(struct ddb *dev, u32 adr)