lib/Kconfig: Remove RAMSTAGE_CBMEM_TOP_ARG

All targets now have the _cbmem_top_ptr symbol populated via calling
arguments or in the nvidia/tegra210 case worked around by populating
it with cbmem_top_chipset explicitly at the start of ramstage, so the
Kconfig guarding this behavior can be removed.

Change-Id: Ie7467629e58700e4d29f6e735840c22ed687f880
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36422
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Michael Niewöhner
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/arm/Kconfig

@@ -17,7 +17,6 @@ config ARCH_ROMSTAGE_ARM
 config ARCH_RAMSTAGE_ARM
 	bool
 	select ARCH_ARM
-	select RAMSTAGE_CBMEM_TOP_ARG
 
 source src/arch/arm/armv4/Kconfig
 source src/arch/arm/armv7/Kconfig

src/arch/arm64/Kconfig

@@ -17,7 +17,6 @@ config ARCH_ROMSTAGE_ARM64
 config ARCH_RAMSTAGE_ARM64
 	bool
 	select ARCH_ARM64
-	select RAMSTAGE_CBMEM_TOP_ARG
 
 source src/arch/arm64/armv8/Kconfig
 

src/arch/mips/Kconfig

@@ -22,7 +22,6 @@ config ARCH_BOOTBLOCK_MIPS
 	default n
 	select BOOTBLOCK_CUSTOM
 	select C_ENVIRONMENT_BOOTBLOCK
-	select RAMSTAGE_CBMEM_TOP_ARG
 
 config ARCH_VERSTAGE_MIPS
 	bool

src/arch/ppc64/Kconfig

@@ -1,6 +1,5 @@
 config ARCH_PPC64
 	bool
-	select RAMSTAGE_CBMEM_TOP_ARG
 
 config ARCH_BOOTBLOCK_PPC64
 	bool

src/arch/riscv/Kconfig

@@ -90,7 +90,6 @@ config ARCH_ROMSTAGE_RISCV
 config ARCH_RAMSTAGE_RISCV
 	bool
 	default n
-	select RAMSTAGE_CBMEM_TOP_ARG
 
 config RISCV_USE_ARCH_TIMER
 	bool

src/arch/x86/Kconfig

@@ -16,7 +16,6 @@ config ARCH_X86
 	default n
 	select PCI
 	select RELOCATABLE_MODULES
-	select RAMSTAGE_CBMEM_TOP_ARG
 
 # stage selectors for x86