Commit 4921d0a7535b ('i386: switch boards to "default y"') makes
CONIFG_X86_64 select CONFIG_I386, which makes it difficult to define
X86_64 only configs, e.g., for TDX.

Decouple I386 from X86_64.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
 hw/i386/Kconfig     | 10 +++++-----
 target/i386/Kconfig |  1 -
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/hw/i386/Kconfig b/hw/i386/Kconfig
index eb65bda6e071..6fc353930985 100644
--- a/hw/i386/Kconfig
+++ b/hw/i386/Kconfig
@@ -74,7 +74,7 @@ config PC_ACPI
 config I440FX
     bool
     default y
-    depends on I386
+    depends on (I386 || X86_64)
     imply E1000_PCI
     imply VMPORT
     imply VMMOUSE
@@ -91,7 +91,7 @@ config I440FX
 config ISAPC
     bool
     default y
-    depends on I386
+    depends on (I386 || X86_64)
     imply VGA_ISA
     select ISA_BUS
     select PC
@@ -103,7 +103,7 @@ config ISAPC
 config Q35
     bool
     default y
-    depends on I386
+    depends on (I386 || X86_64)
     imply VTD
     imply AMD_IOMMU
     imply E1000E_PCI_EXPRESS
@@ -122,7 +122,7 @@ config Q35
 config MICROVM
     bool
     default y
-    depends on I386 && FDT
+    depends on (I386 || X86_64) && FDT
     select DEVICE_TREE
     select SERIAL_ISA # for serial_hds_isa_init()
     select ISA_BUS
@@ -168,4 +168,4 @@ config VMMOUSE
 config XEN_EMU
     bool
     default y
-    depends on KVM && I386
+    depends on KVM && (I386 || X86_64)
diff --git a/target/i386/Kconfig b/target/i386/Kconfig
index 6b0feef02997..f16efa7137d5 100644
--- a/target/i386/Kconfig
+++ b/target/i386/Kconfig
@@ -6,4 +6,3 @@ config I386
 
 config X86_64
     bool
-    select I386
-- 
2.43.0