[PATCH v2 02/11] dma: select ARCH_DMA_DEFAULT_COHERENT for x86 and sandbox

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Linux only considers the value of CONFIG_ARCH_DMA_DEFAULT_COHERENT if
the architecture also defines either of:

  - CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE
  - CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU
  - CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL

We don't have those in barebox and also have less architectures to
support, so we'll just select ARCH_DMA_DEFAULT_COHERENT from all
architectures where this applies to: x86, sandbox and RISC-V.
RISC-V already selects it, so we add it to the other two.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
  v1 -> v2:
    - select symbol for sandbox as well
---
 arch/sandbox/Kconfig | 1 +
 arch/x86/Kconfig     | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig
index 136a97b1ad30..3419b6e4f686 100644
--- a/arch/sandbox/Kconfig
+++ b/arch/sandbox/Kconfig
@@ -18,6 +18,7 @@ config SANDBOX
 	select ARCH_HAS_SJLJ
 	select ARCH_HAS_CTRLC
 	select HAS_DEBUG_LL
+	select ARCH_DMA_DEFAULT_COHERENT
 	default y
 
 config ARCH_TEXT_BASE
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index bd6a94bd0b0e..b982ea32cb3a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -5,6 +5,7 @@ config X86
 	select HAS_KALLSYMS
 	select HAS_DMA
 	select GENERIC_FIND_NEXT_BIT
+	select ARCH_DMA_DEFAULT_COHERENT
 	default y
 
 config ARCH_TEXT_BASE
-- 
2.39.2