m68k: Simplify ioremap_nocache()

Just define ioremap_nocache to ioremap instead of duplicating the
inline.  Also define ioremap_uc in terms of ioremap instead of
using a double indirection.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20190817073253.27819-9-hch@lst.deSigned-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/include/asm/kmap.h

@@ -28,14 +28,8 @@ static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
 	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
 }
 
-#define ioremap_nocache ioremap_nocache
-static inline void __iomem *ioremap_nocache(unsigned long physaddr,
-					    unsigned long size)
-{
-	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
-}
-
-#define ioremap_uc ioremap_nocache
+#define ioremap_nocache ioremap
+#define ioremap_uc ioremap
 #define ioremap_wt ioremap_wt
 static inline void __iomem *ioremap_wt(unsigned long physaddr,
 				       unsigned long size)