qcacld-3.0: Change the policy & priority of RX thread

Change the policy & priority of RX thread to improve the RX throughput for
Specified platform.

Change-Id: Ie9df5de6f34d75264c4f3b7bdcb59ab92845a128
CRs-Fixed: 2354502
diff --git a/Kbuild b/Kbuild
index fcd537b..157c696 100644
--- a/Kbuild
+++ b/Kbuild
@@ -2167,12 +2167,18 @@
 
 ifeq ($(CONFIG_ARCH_MSM8996), y)
 CONFIG_FEATURE_SG := y
+CONFIG_RX_THREAD_PRIORITY := y
 endif
 
 ifeq ($(CONFIG_FEATURE_SG), y)
 cppflags-y += -DFEATURE_SG
 endif
 
+ifeq ($(CONFIG_RX_THREAD_PRIORITY), y)
+cppflags-y += -DRX_THREAD_PRIORITY
+endif
+
+
 #Enable wbuff
 cppflags-$(CONFIG_WLAN_WBUFF) += -DWLAN_FEATURE_WBUFF