powerpc/floppy: Remove usage of the deprecated "pci-dma-compat.h" API

In [1], Christoph Hellwig has proposed to remove the wrappers in
include/linux/pci-dma-compat.h.

Some reasons why this API should be removed have been given by Julia
Lawall in [2].

A coccinelle script has been used to perform the needed transformation
Only relevant parts are given below.

@@ @@
-    PCI_DMA_TODEVICE
+    DMA_TO_DEVICE

@@ @@
-    PCI_DMA_FROMDEVICE
+    DMA_FROM_DEVICE

@@
expression e1, e2, e3, e4;
@@
-    pci_map_single(e1, e2, e3, e4)
+    dma_map_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_single(e1, e2, e3, e4)
+    dma_unmap_single(&e1->dev, e2, e3, e4)

[1]: https://lore.kernel.org/kernel-janitors/20200421081257.GA131897@infradead.org/
[2]: https://lore.kernel.org/kernel-janitors/alpine.DEB.2.22.394.2007120902170.2424@hadrien/

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/9e24eedeab44cbb840598bb188561a48811de845.1641119338.git.christophe.jaillet@wanadoo.fr

Author: tititiou36

arch/powerpc/include/asm/floppy.h

@@ -134,17 +134,19 @@ static int hard_dma_setup(char *addr, unsigned long size, int mode, int io)
 	int dir;
 
 	doing_vdma = 0;
-	dir = (mode == DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
+	dir = (mode == DMA_MODE_READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
 
 	if (bus_addr 
 	    && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
 		/* different from last time -- unmap prev */
-		pci_unmap_single(isa_bridge_pcidev, bus_addr, prev_size, prev_dir);
+		dma_unmap_single(&isa_bridge_pcidev->dev, bus_addr, prev_size,
+				 prev_dir);
 		bus_addr = 0;
 	}
 
 	if (!bus_addr)	/* need to map it */
-		bus_addr = pci_map_single(isa_bridge_pcidev, addr, size, dir);
+		bus_addr = dma_map_single(&isa_bridge_pcidev->dev, addr, size,
+					  dir);
 
 	/* remember this one as prev */
 	prev_addr = addr;