dmaengine: fsldma: Add 64-bit I/O accessors for powerpc64

Otherwise 64-bit PPC builds fail with undefined references
to these accessors.

Cc: Peng Ma <peng.ma@nxp.com>
Cc: Wen He <wen.he_1@nxp.com>
Fixes: 68997fff94afa (" dmaengine: fsldma: Adding macro FSL_DMA_IN/OUT implement for ARM platform")
Signed-off-by: Scott Wood <oss@buserror.net>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/fsldma.h

@@ -202,7 +202,12 @@ struct fsldma_chan {
 #define fsl_iowrite32(v, p)	out_le32(p, v)
 #define fsl_iowrite32be(v, p)	out_be32(p, v)
 
-#ifndef __powerpc64__
+#ifdef __powerpc64__
+#define fsl_ioread64(p)		in_le64(p)
+#define fsl_ioread64be(p)	in_be64(p)
+#define fsl_iowrite64(v, p)	out_le64(p, v)
+#define fsl_iowrite64be(v, p)	out_be64(p, v)
+#else
 static u64 fsl_ioread64(const u64 __iomem *addr)
 {
 	u32 fsl_addr = lower_32_bits(addr);