[POWERPC] Make non-PCI build work again

Maple and pasemi both require PCI as does CONFIG_OF_PLATFORM_PCI.
The default setting of CONFIG_ISA_DMA_API is set to match the protection
around the relevant routines in asm/dma.h.

I also had to remove the PMAC platform from the combined build.  The
precis is that to build a 64 bit kernel with no PCI, you can only include
pSeries and iSeries.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 232c298..d40844f 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -160,6 +160,7 @@
 
 config PPC_OF_PLATFORM_PCI
 	bool
+	depends on PCI
 	depends on PPC64 # not supported on 32 bits yet
 	default n
 
@@ -417,7 +418,7 @@
 
 config ISA_DMA_API
 	bool
-	default y
+	default !PPC_ISERIES || PCI
 
 menu "Bus options"