qemu-intel64: move PCI initialization back to board logic

this partly revert 4123615621 which works OK for PCI serial and network cards
but breaks QEMU EDU due to usage of sem and usleep in IDLE thread context.
Another solution will be provided later.

Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>

arch/x86_64/src/common/x86_64_initialize.c

@@ -115,12 +115,6 @@ void up_initialize(void)
   x86_64_serialinit();
 #endif
 
-  /* Initialize the PCI bus */
-
-#ifdef CONFIG_PCI
-  x86_64_pci_init();
-#endif
-
   /* Initialize the network */
 
 #ifndef CONFIG_NETDEV_LATEINIT

boards/x86_64/intel64/qemu-intel64/src/qemu_bringup.c

@@ -36,6 +36,7 @@
 #  include <nuttx/timers/oneshot.h>
 #endif
 
+#include "x86_64_internal.h"
 #include "qemu_intel64.h"
 
 /****************************************************************************
@@ -54,6 +55,12 @@ int qemu_bringup(void)
 
   int ret = OK;
 
+  /* Initialize the PCI bus */
+
+#ifdef CONFIG_PCI
+  x86_64_pci_init();
+#endif
+
 #ifdef CONFIG_FS_PROCFS
   /* Mount the procfs file system */