[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: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/Kconfig

@@ -160,6 +160,7 @@ config PPC_DCR
 
 config PPC_OF_PLATFORM_PCI
 	bool
+	depends on PCI
 	depends on PPC64 # not supported on 32 bits yet
 	default n
 
@@ -417,7 +418,7 @@ endmenu
 
 config ISA_DMA_API
 	bool
-	default y
+	default !PPC_ISERIES || PCI
 
 menu "Bus options"
 

arch/powerpc/platforms/maple/Kconfig

 config PPC_MAPLE
 	depends on PPC_MULTIPLATFORM && PPC64
 	bool "Maple 970FX Evaluation Board"
+	select PCI
 	select MPIC
 	select U3_DART
 	select MPIC_U3_HT_IRQS

arch/powerpc/platforms/pasemi/Kconfig

@@ -3,6 +3,7 @@ config PPC_PASEMI
 	bool "PA Semi SoC-based platforms"
 	default n
 	select MPIC
+	select PCI
 	select PPC_UDBG_16550
 	select PPC_NATIVE
 	select MPIC_BROKEN_REGREAD