pci: Make pci apis usable before relocation

Introduce a gd->hose to save the pci hose in the early phase so that
apis in drivers/pci/pci.c can be used before relocation. Architecture
codes need assign a valid gd->hose in the early phase.

Some variables are declared as static so change them to be either
stack variable or global data member so that they can be used before
relocation, except the 'indent' used by CONFIG_PCI_SCAN_SHOW which
just affects some print format.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

include/asm-generic/global_data.h

@@ -90,6 +90,12 @@ typedef struct global_data {
 	unsigned long malloc_base;	/* base address of early malloc() */
 	unsigned long malloc_limit;	/* limit address */
 	unsigned long malloc_ptr;	/* current address */
+#endif
+#ifdef CONFIG_PCI
+	struct pci_controller *hose;	/* PCI hose for early use */
+#endif
+#ifdef CONFIG_PCI_BOOTDELAY
+	int pcidelay_done;
 #endif
 	struct udevice *cur_serial_dev;	/* current serial device */
 	struct arch_global_data arch;	/* architecture-specific data */