iwlwifi: remove support for fw older than -17 and -22

FW versions older than -17 for 3160 and 7260 and older than -22 for
newer NICs are not supported anymore.  Don't load these versions
and remove code that handles them.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/power.c b/drivers/net/wireless/intel/iwlwifi/mvm/power.c
index ff85865..af6d10c 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/power.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/power.c
@@ -694,8 +694,7 @@
 
 	/* enable PM on p2p if p2p stand alone */
 	if (vifs->p2p_active && !vifs->bss_active && !vifs->ap_active) {
-		if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_P2P_PM)
-			p2p_mvmvif->pm_enabled = true;
+		p2p_mvmvif->pm_enabled = true;
 		return;
 	}
 
@@ -707,12 +706,10 @@
 				   ap_mvmvif->phy_ctxt->id);
 
 	/* clients are not stand alone: enable PM if DCM */
-	if (!(client_same_channel || ap_same_channel) &&
-	    (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_DCM)) {
+	if (!(client_same_channel || ap_same_channel)) {
 		if (vifs->bss_active)
 			bss_mvmvif->pm_enabled = true;
-		if (vifs->p2p_active &&
-		    (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_P2P_PM))
+		if (vifs->p2p_active)
 			p2p_mvmvif->pm_enabled = true;
 		return;
 	}
@@ -721,12 +718,10 @@
 	 * There is only one channel in the system and there are only
 	 * bss and p2p clients that share it
 	 */
-	if (client_same_channel && !vifs->ap_active &&
-	    (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_SCM)) {
+	if (client_same_channel && !vifs->ap_active) {
 		/* share same channel*/
 		bss_mvmvif->pm_enabled = true;
-		if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_P2P_PM)
-			p2p_mvmvif->pm_enabled = true;
+		p2p_mvmvif->pm_enabled = true;
 	}
 }