qcacld-3.0: Add one flag for Genoa IPA workaround

Currently, there is some issue about IPA GSI update
copy engien 5 write index register failure, so add
this flag for Genoa IPA workaround, once the real fix
is ready, will revert this flag.

Change-Id: I17313ea281bad03f471222b54802fa9628893e1f

Kbuild

@@ -2739,6 +2739,8 @@ cppflags-y += -DMAX_IPA_IFACE=$(NUM_IPA_IFACE)
 endif
 endif
 
+cppflags-$(CONFIG_GENOA_IPA_WORKAROUND) += -DGENOA_IPA_WORKAROUND
+
 cppflags-$(CONFIG_TUFELLO_DUAL_FW_SUPPORT) += -DCONFIG_TUFELLO_DUAL_FW_SUPPORT
 cppflags-$(CONFIG_CHANNEL_HOPPING_ALL_BANDS) += -DCHANNEL_HOPPING_ALL_BANDS