hw/nvram/Kconfig: Restrict CHRP NVRAM to machines using OpenBIOS or SLOF

Only the OpenBIOS and SLOF firmwares use the CHRP NVRAM layout.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191231183216.6781-14-philmd@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/nvram/Kconfig

@@ -7,7 +7,11 @@ config AT24C
 
 config MAC_NVRAM
     bool
+    select CHRP_NVRAM
 
 # NMC93XX uses the NS uWire interface (similar to SPI but less configurable)
 config NMC93XX_EEPROM
     bool
+
+config CHRP_NVRAM
+    bool

hw/nvram/Makefile.objs

@@ -2,7 +2,7 @@ common-obj-$(CONFIG_DS1225Y) += ds1225y.o
 common-obj-$(CONFIG_NMC93XX_EEPROM) += eeprom93xx.o
 common-obj-$(CONFIG_AT24C) += eeprom_at24c.o
 common-obj-y += fw_cfg.o
-common-obj-y += chrp_nvram.o
+common-obj-$(CONFIG_CHRP_NVRAM) += chrp_nvram.o
 common-obj-$(CONFIG_MAC_NVRAM) += mac_nvram.o
 obj-$(CONFIG_PSERIES) += spapr_nvram.o
 obj-$(CONFIG_NRF51_SOC) += nrf51_nvm.o

hw/ppc/Kconfig

@@ -11,6 +11,7 @@ config PSERIES
     select XIVE_SPAPR
     select MSI_NONBROKEN
     select FDT_PPC
+    select CHRP_NVRAM
 
 config SPAPR_RNG
     bool

hw/sparc/Kconfig

@@ -12,6 +12,7 @@ config SUN4M
     select LANCE
     select M48T59
     select STP2000
+    select CHRP_NVRAM
 
 config LEON3
     bool

hw/sparc64/Kconfig

@@ -12,6 +12,7 @@ config SUN4U
     select IDE_CMD646
     select PCKBD
     select SIMBA
+    select CHRP_NVRAM
 
 config NIAGARA
     bool