qcacld-3.0: Remove unused feature flag

Since we have final solution for Genoa IPA now,
so remove the workaround feature now.

Change-Id: I4b91c4a5cb0d327796eb1810a26b50c78a9a3ac9

Kbuild

@@ -2744,7 +2744,6 @@ 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