qcacld-3.0: Add flag for protected dp peer access

Add compiler preprocessor directive to enable DP peer
protected access mechanism in Kbuild for lithium dp.

Change-Id: I3808369b4c0ef678d448b7536fd29dee8748e9ba
CRs-Fixed: 2309393

Kbuild

@@ -2230,6 +2230,7 @@ cppflags-$(CONFIG_WLAN_FEATURE_11AX) += -DWLAN_FEATURE_11AX_BSS_COLOR
 cppflags-$(CONFIG_WLAN_FEATURE_11AX) += -DSUPPORT_11AX_D3
 
 cppflags-$(CONFIG_LITHIUM) += -DFEATURE_AST
+cppflags-$(CONFIG_LITHIUM) += -DPEER_PROTECTED_ACCESS
 
 # Vendor Commands
 cppflags-$(CONFIG_FEATURE_RSSI_MONITOR) += -DFEATURE_RSSI_MONITOR