[POWERPC] CPM2: Make support for the CPM2 optional on 8560 based boards

Currently there is no way to disable the CPM2 support.  Some boards,
like the SBC8560 have their own external UART and don't have any direct
dependencies on the CPM for a serial console or anything else.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/platforms/85xx/Kconfig

@@ -13,6 +13,7 @@ config MPC8560_ADS
 	bool "Freescale MPC8560 ADS"
 	select DEFAULT_UIMAGE
 	select PPC_CPM_NEW_BINDING
+	select CPM2
 	help
 	  This option enables support for the MPC 8560 ADS board
 
@@ -43,6 +44,7 @@ config STX_GP3
 	help
 	  This option enables support for the Silicon Turnkey Express GP3
 	  board.
+	select CPM2
 	select DEFAULT_UIMAGE
 	select PPC_CPM_NEW_BINDING
 
@@ -84,7 +86,7 @@ config TQM8560
 config SBC8560
 	bool "Wind River SBC8560"
 	select DEFAULT_UIMAGE
-	select PPC_CPM_NEW_BINDING
+	select PPC_CPM_NEW_BINDING if CPM2
 	help
 	  This option enables support for the Wind River SBC8560 board
 
@@ -100,11 +102,6 @@ config MPC8540
 	select PPC_INDIRECT_PCI
 	default y if MPC8540_ADS || MPC85xx_CDS
 
-config MPC8560
-	bool
-	select CPM2
-	default y if MPC8560_ADS || STX_GP3 || SBC8560
-
 config MPC85xx
 	bool
 	select PPC_UDBG_16550

arch/powerpc/platforms/Kconfig

@@ -278,8 +278,8 @@ config QUICC_ENGINE
 	  for a machine with a QE coprocessor.
 
 config CPM2
-	bool
-	default n
+	bool "Enable support for the CPM2 (Communications Processor Module)"
+	depends on MPC85xx || 8260
 	select CPM
 	select PPC_LIB_RHEAP
 	help