hw/misc: Add a config switch for the "unimplemented" device

The device is only used by some few boards. Let's use a proper Kconfig
switch so that we only compile this code if we really need it.

Message-Id: <20190817101931.28386-8-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/arm/Kconfig

@@ -82,6 +82,7 @@ config MUSCA
     select PL011
     select PL031
     select SPLIT_IRQ
+    select UNIMP
 
 config MUSICPAL
     bool
@@ -217,6 +218,7 @@ config STELLARIS
     select SSI_SD
     select STELLARIS_INPUT
     select STELLARIS_ENET # ethernet
+    select UNIMP
 
 config STRONGARM
     bool
@@ -283,6 +285,7 @@ config ALLWINNER_A10
     select ALLWINNER_A10_PIC
     select ALLWINNER_EMAC
     select SERIAL
+    select UNIMP
 
 config RASPI
     bool
@@ -320,6 +323,7 @@ config XLNX_VERSAL
     select PL011
     select CADENCE
     select VIRTIO_MMIO
+    select UNIMP
 
 config FSL_IMX25
     bool
@@ -355,6 +359,7 @@ config ASPEED_SOC
     select SSI_M25P80
     select TMP105
     select TMP421
+    select UNIMP
 
 config MPS2
     bool
@@ -366,6 +371,7 @@ config MPS2
     select PL022    # Serial port
     select PL080    # DMA controller
     select SPLIT_IRQ
+    select UNIMP
 
 config FSL_IMX7
     bool
@@ -378,6 +384,7 @@ config FSL_IMX7
     select IMX_I2C
     select PCI_EXPRESS_DESIGNWARE
     select SDHCI
+    select UNIMP
 
 config ARM_SMMUV3
     bool
@@ -389,6 +396,7 @@ config FSL_IMX6UL
     select IMX_FEC
     select IMX_I2C
     select SDHCI
+    select UNIMP
 
 config MICROBIT
     bool
@@ -398,6 +406,7 @@ config NRF51_SOC
     bool
     select I2C
     select ARM_V7M
+    select UNIMP
 
 config EMCRAFT_SF2
     bool
@@ -410,6 +419,7 @@ config MSF2
     select PTIMER
     select SERIAL
     select SSI
+    select UNIMP
 
 config ZAURUS
     bool
@@ -448,6 +458,7 @@ config ARMSSE
     select TZ_MPC
     select TZ_MSC
     select TZ_PPC
+    select UNIMP
 
 config ARMSSE_CPUID
     bool

hw/microblaze/Kconfig

@@ -4,6 +4,7 @@ config PETALOGIX_S3ADSP1800
     select XILINX
     select XILINX_AXI
     select XILINX_ETHLITE
+    select UNIMP
 
 config PETALOGIX_ML605
     bool

hw/misc/Kconfig

@@ -117,4 +117,7 @@ config AUX
     bool
     select I2C
 
+config UNIMP
+    bool
+
 source macio/Kconfig

hw/misc/Makefile.objs

@@ -9,7 +9,7 @@ common-obj-$(CONFIG_PCI_TESTDEV) += pci-testdev.o
 common-obj-$(CONFIG_EDU) += edu.o
 common-obj-$(CONFIG_PCA9552) += pca9552.o
 
-common-obj-y += unimp.o
+common-obj-$(CONFIG_UNIMP) += unimp.o
 common-obj-$(CONFIG_FW_CFG_DMA) += vmcoreinfo.o
 
 # ARM devices

hw/sparc64/Kconfig

@@ -17,3 +17,4 @@ config NIAGARA
     bool
     select EMPTY_SLOT
     select SUN4V_RTC
+    select UNIMP