ice: switch: Simplify memory allocation

'rbuf' is locale to the ice_get_initial_sw_cfg() function.
There is no point in using devm_kzalloc()/devm_kfree().

use kzalloc()/kfree() instead.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice_switch.c

@@ -2274,9 +2274,7 @@ int ice_get_initial_sw_cfg(struct ice_hw *hw)
 	int status;
 	u16 i;
 
-	rbuf = devm_kzalloc(ice_hw_to_dev(hw), ICE_SW_CFG_MAX_BUF_LEN,
-			    GFP_KERNEL);
-
+	rbuf = kzalloc(ICE_SW_CFG_MAX_BUF_LEN, GFP_KERNEL);
 	if (!rbuf)
 		return -ENOMEM;
 
@@ -2324,7 +2322,7 @@ int ice_get_initial_sw_cfg(struct ice_hw *hw)
 		}
 	} while (req_desc && !status);
 
-	devm_kfree(ice_hw_to_dev(hw), rbuf);
+	kfree(rbuf);
 	return status;
 }