alim15x3: disable init_hwif_ali15x3 for PowerPC

We don't need init_hwif_ali15x3() on the PowerPC systems either.

Before:

ALI15X3: IDE controller (0x10b9:0x5229 rev 0xc8) at PCI slot 0001:03:1f.0
ALI15X3: 100% native mode on irq 19
ide0: BM-DMA at 0x1120-0x1127
ide1: BM-DMA at 0x1128-0x112f
hda: SONY DVD RW AW-Q170A, ATAPI CD/DVD-ROM drive
hda: UDMA/66 mode selected
ide0: Disabled unable to get IRQ 14.
ide0: failed to initialize IDE interface
ide1: Disabled unable to get IRQ 15.
ide1: failed to initialize IDE interface

After:

ALI15X3: IDE controller (0x10b9:0x5229 rev 0xc8) at PCI slot 0001:03:1f.0
ALI15X3: 100% native mode on irq 19
ide0: BM-DMA at 0x1120-0x1127
ide1: BM-DMA at 0x1128-0x112f
hda: SONY DVD RW AW-Q170A, ATAPI CD/DVD-ROM drive
hda: UDMA/66 mode selected
ide0 at 0x1100-0x1107,0x110a on irq 19
ide1 at 0x1110-0x1117,0x111a on irq 19
hda: ATAPI 48X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache

ide0 works well, though I can't test ide1, it isn't traced out on
the board.

Signed-off-by: Anton Vorontsov <[e-mail]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[e-mail]>

drivers/ide/pci/alim15x3.c

···
 	return cbl;
 }
 
-#ifndef CONFIG_SPARC64
+#if !defined(CONFIG_SPARC64) && !defined(CONFIG_PPC)
 /**
  *	init_hwif_ali15x3	-	Initialize the ALI IDE x86 stuff
  *	@hwif: interface to configure
  *
  *	Obtain the IRQ tables for an ALi based IDE solution on the PC
  *	class platforms. This part of the code isn't applicable to the
- *	Sparc systems
+ *	Sparc and PowerPC systems.
  */
 
 static void __devinit init_hwif_ali15x3 (ide_hwif_t *hwif)
···
 			hwif->irq = irq;
 	}
 }
-#endif
+#else
+#define init_hwif_ali15x3 NULL
+#endif /* !defined(CONFIG_SPARC64) && !defined(CONFIG_PPC) */
 
 /**
  *	init_dma_ali15x3	-	set up DMA on ALi15x3
···
 static const struct ide_port_info ali15x3_chipset __devinitdata = {
 	.name		= "ALI15X3",
 	.init_chipset	= init_chipset_ali15x3,
-#ifndef CONFIG_SPARC64
 	.init_hwif	= init_hwif_ali15x3,
-#endif
 	.init_dma	= init_dma_ali15x3,
 	.port_ops	= &ali_port_ops,
 	.pio_mask	= ATA_PIO5,