pci: fix kabi error caused by pm_suspend_target_state

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6BWFP

--------------------------------

fix kabi error caused by pm_suspend_target_state,used only
by loongson devices.
Signed-off-by: NHongchen Zhang <zhanghongchen@loongson.cn>

drivers/pci/pci.c

@@ -31,7 +31,9 @@
 #include <linux/vmalloc.h>
 #include <asm/dma.h>
 #include <linux/aer.h>
+#ifdef CONFIG_MACH_LOONGSON64
 #include <linux/suspend.h>
+#endif
 #include "pci.h"
 
 DEFINE_MUTEX(pci_slot_mutex);
@@ -148,11 +150,15 @@ static bool pci_bridge_d3_disable;
 /* Force bridge_d3 for all PCIe ports */
 static bool pci_bridge_d3_force;
 
+#ifdef CONFIG_MACH_LOONGSON64
+
 #ifndef CONFIG_PM_SLEEP
 suspend_state_t pm_suspend_target_state;
 #define pm_suspend_target_state (PM_SUSPEND_ON)
 #endif
 
+#endif
+
 static int __init pcie_port_pm_setup(char *str)
 {
 	if (!strcmp(str, "off"))
@@ -5756,8 +5762,9 @@ int pcie_set_readrq(struct pci_dev *dev, int rq)
 {
 	u16 v;
 	int ret;
+#ifdef CONFIG_MACH_LOONGSON64
 	struct pci_host_bridge *bridge = pci_find_host_bridge(dev->bus);
-
+#endif
 	if (rq < 128 || rq > 4096 || !is_power_of_2(rq))
 		return -EINVAL;
 
@@ -5774,12 +5781,13 @@ int pcie_set_readrq(struct pci_dev *dev, int rq)
 	}
 
 	v = (ffs(rq) - 8) << 12;
-
+#ifdef CONFIG_MACH_LOONGSON64
 	if (pm_suspend_target_state == PM_SUSPEND_ON &&
 		bridge->no_inc_mrrs) {
 		if (rq > pcie_get_readrq(dev))
 			return -EINVAL;
 	}
+#endif
 
 	ret = pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL,
 						  PCI_EXP_DEVCTL_READRQ, v);