qcacld-3.0: Use correct flag to compile USB-PLD file

Currently we are using different flags to enable compilation of pld_usb.c
and one to enable/disable PLD USB stub functions. Use the same flag for
both cases - CONFIG_PLD_USB_CNSS

Change-Id: Icc89405d785f3fc0ebc4a97d234013ac86ebd068
CRs-Fixed: 1076326
diff --git a/Kbuild b/Kbuild
index c6ea5d2..ac31aff 100644
--- a/Kbuild
+++ b/Kbuild
@@ -246,6 +246,7 @@
 #Enable USB specific APIS
 ifeq ($(CONFIG_ROME_IF),usb)
 	CONFIG_HIF_USB := 1
+	CONFIG_PLD_USB_CNSS := y
 endif
 
 #Enable pci read/write config functions
@@ -970,7 +971,7 @@
 ifeq ($(CONFIG_CNSS_SDIO),y)
 PLD_OBJS +=	$(PLD_SRC_DIR)/pld_sdio.o
 endif
-ifeq ($(CONFIG_USB), y)
+ifeq ($(CONFIG_PLD_USB_CNSS), y)
 PLD_OBJS +=	$(PLD_SRC_DIR)/pld_usb.o
 endif
 
@@ -1315,7 +1316,8 @@
 #Enable USB specific APIS
 ifeq ($(CONFIG_HIF_USB), 1)
 CDEFINES += -DHIF_USB \
-	    -DCONFIG_HL_SUPPORT
+            -DCONFIG_PLD_USB_CNSS \
+            -DCONFIG_HL_SUPPORT
 endif
 
 #Enable FW logs through ini