pcie: add framework

Squashed commits:

1. x86_64: qemu: implement pci-e functions and enumerate pci-e devices on boot

2. virt: add qemu pci-testdev driver

3. pcie: types array should be null terminated

4. pcie: enable don't take flags, hardcoded enabling flags

5. pcie: checking bar > 4 for 64bit bars are sufficient

6. pcie: qemu: remove not used header

7. pcie: qemu: return -EINVAL if buffer argument is NULL

8. pcie: make pcie enumerate routine as common instead of architecture dependent

9. pcie: cosmetic changes to fit check tools

10. pcie: create MSI/MSIX related marcos and simplify the msi/msix routines

Kconfig

@@ -2196,6 +2196,41 @@ config DEBUG_IPC_INFO
 
 endif # DEBUG_IPC
 
+=======
+config DEBUG_PCIE
+	bool "PCI-E Debug Features"
+	default n
+	depends on PCIE
+	---help---
+		Enable PCIE driver debug features.
+
+		Support for this debug option is architecture-specific and may not
+		be available for some MCUs.
+
+if DEBUG_PCIE
+
+config DEBUG_PCIE_ERROR
+	bool "PCI-E Error Output"
+	default n
+	depends on DEBUG_ERROR
+	---help---
+		Enable PCI-E driver error output to SYSLOG.
+
+config DEBUG_PCIE_WARN
+	bool "PCI-E Warnings Output"
+	default n
+	depends on DEBUG_WARN
+	---help---
+		Enable PCI-E driver warning output to SYSLOG.
+
+config DEBUG_PCIE_INFO
+	bool "PCI-E Informational Output"
+	default n
+	depends on DEBUG_INFO
+	---help---
+		Enable PCI-E driver informational output to SYSLOG.
+
+endif # DEBUG_PCIE
 endif # DEBUG_FEATURES
 
 config ARCH_HAVE_STACKCHECK