qcacld-3.0: add peach flag in kbuild

Current code does not have peach flag, fix by adding peach flag
in kbuild

Change-Id: Ica003b2b0a12ab688f50702844c09e183dfc3fda
CRs-Fixed: 3387064

Kbuild

@@ -4022,6 +4022,7 @@ cppflags-$(CONFIG_QCA_WIFI_QCA6750) += -DQCA_WIFI_QCA6750
 cppflags-$(CONFIG_QCA_WIFI_KIWI) += -DQCA_WIFI_KIWI
 cppflags-$(CONFIG_CNSS_KIWI_V2) += -DQCA_WIFI_KIWI_V2
 cppflags-$(CONFIG_CNSS_MANGO) += -DQCA_WIFI_MANGO
+cppflags-$(CONFIG_CNSS_PEACH) += -DQCA_WIFI_PEACH
 cppflags-$(CONFIG_QCA_WIFI_QCA8074) += -DQCA_WIFI_QCA8074
 cppflags-$(CONFIG_SCALE_INCLUDES) += -DSCALE_INCLUDES
 cppflags-$(CONFIG_QCA_WIFI_QCA8074_VP) += -DQCA_WIFI_QCA8074_VP