qcacld-3.0: Use IS_ENABLED for the definition of kernel module

Add support and use IS_ENABLED in code, if CONFIG_IPA3 config as
loadable kernel module.

Change-Id: Iaf86c9da2a9946aac09867b5c46dcc79f1b5c37e
CRs-Fixed: 2701642

configs/genoa.pci.debug_defconfig

@@ -27,7 +27,10 @@ CONFIG_IPA_OFFLOAD := y
 else
 CONFIG_IPA_DISABLE_OVERRIDE=y
 endif
-ifeq ($(CONFIG_IPA3), y)
+ifeq ($(CONFIG_IPA3), m)
+CONFIG_IPA3_MODULE := y
+endif
+ifeq (y, $(findstring y, $(CONFIG_IPA3) $(CONFIG_IPA3_MODULE)))
 CONFIG_IPA_OFFLOAD := y
 else
 CONFIG_IPA_DISABLE_OVERRIDE=y