qcacld-3.0: Fix compiler issue about cnss_set_pcie_gen_speed

Since some platform driver does not support for PCIE gen switch,
Using macro PCIE_GEN_SWITCH to control whether function
cnss_set_pcie_gen_speed is invoke or not.

Change-Id: I478cd6426b005014e85c0b3c1c31963045d7322b
CRs-Fixed: 2767110

Kbuild

@@ -2894,6 +2894,9 @@ cppflags-$(CONFIG_HL_DP_SUPPORT) += -DQCA_COMPUTE_TX_DELAY_PER_TID
 cppflags-$(CONFIG_LL_DP_SUPPORT) += -DCONFIG_LL_DP_SUPPORT
 cppflags-$(CONFIG_LL_DP_SUPPORT) += -DWLAN_FULL_REORDER_OFFLOAD
 
+# For PCIe GEN switch
+cppflags-$(CONFIG_PCIE_GEN_SWITCH) += -DPCIE_GEN_SWITCH
+
 # For OOB testing
 cppflags-$(CONFIG_WLAN_FEATURE_WOW_PULSE) += -DWLAN_FEATURE_WOW_PULSE
 

configs/default_defconfig

@@ -44,6 +44,7 @@ ifeq ($(CONFIG_CNSS_QCA6490), y)
 	CONFIG_SCALE_INCLUDES := y
 	CONFIG_HASTINGS_BT_WAR := y
 	CONFIG_WDI3_IPA_OVER_GSI :=y
+	CONFIG_PCIE_GEN_SWITCH := y
 endif
 
 ifeq ($(CONFIG_CNSS_QCA6750), y)

core/pld/src/pld_pcie.h

@@ -474,6 +474,7 @@ static inline void pld_pcie_allow_l1(struct device *dev)
 	cnss_pci_allow_l1(dev);
 }
 
+#ifdef PCIE_GEN_SWITCH
 /**
  * pld_pcie_set_gen_speed() - Wrapper for platform API to set PCIE gen speed
  * @dev: device
@@ -487,6 +488,12 @@ static inline int pld_pcie_set_gen_speed(struct device *dev, u8 pcie_gen_speed)
 {
 	return cnss_set_pcie_gen_speed(dev, pcie_gen_speed);
 }
+#else
+static inline int pld_pcie_set_gen_speed(struct device *dev, u8 pcie_gen_speed)
+{
+	return 0;
+}
+#endif
 
 static inline void pld_pcie_link_down(struct device *dev)
 {