iwlwifi: drop support for early versions of 8000

These early versions are no longer supported.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-drv.c b/drivers/net/wireless/iwlwifi/iwl-drv.c
index 66ca000..885c787 100644
--- a/drivers/net/wireless/iwlwifi/iwl-drv.c
+++ b/drivers/net/wireless/iwlwifi/iwl-drv.c
@@ -241,16 +241,10 @@
 	 * previous name and uses the new format.
 	 */
 	if (drv->trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
-		char rev_step[2] = {
-			'A' + CSR_HW_REV_STEP(drv->trans->hw_rev), 0
-		};
-
-		/* A-step doesn't have an indication */
-		if (CSR_HW_REV_STEP(drv->trans->hw_rev) == SILICON_A_STEP)
-			rev_step[0] = 0;
+		char rev_step = 'A' + CSR_HW_REV_STEP(drv->trans->hw_rev);
 
 		snprintf(drv->firmware_name, sizeof(drv->firmware_name),
-			 "%s%s-%s.ucode", name_pre, rev_step, tag);
+			 "%s%c-%s.ucode", name_pre, rev_step, tag);
 	}
 
 	IWL_DEBUG_INFO(drv, "attempting to load firmware %s'%s'\n",