qcacld-3.0: make CONFIG_CNSS_UTILS as wlan driver build option

CONFIG_CNSS_UTILS is controlled in the msm kernel config, while it is
not in the customer kernel.

Since it is a wlan feature, make CONFIG_CNSS_UTILS as wlan driver build
option, so that driver can enable this feature dynamically when building
wlan driver.

Change-Id: Ib8232a67da33e4613524c67cead5b90014fd371d
CRs-Fixed: 2922303

Kbuild

@@ -526,6 +526,7 @@ endif
 $(call add-wlan-objs,dsc,$(DSC_OBJS))
 
 cppflags-$(CONFIG_ONE_MSI_VECTOR) += -DWLAN_ONE_MSI_VECTOR
+cppflags-$(CONFIG_CNSS_UTILS) += -DCONFIG_CNSS_UTILS
 
 cppflags-$(CONFIG_DSC_DEBUG) += -DWLAN_DSC_DEBUG
 cppflags-$(CONFIG_DSC_TEST) += -DWLAN_DSC_TEST