i40e/i40evf: fix a potential type compare issue

Rework an if expression to assure there is no type compare problem between
a size and a possible negative number.

Change-ID: I4921fcc96abfcf69490efce020a9e4007f251c99
Reported-by: Helin Zhang <helin.zhang@intel.com>
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_adminq.h

@@ -144,8 +144,7 @@ static inline int i40e_aq_rc_to_posix(int aq_ret, int aq_rc)
 	if (aq_ret == I40E_ERR_ADMIN_QUEUE_TIMEOUT)
 		return -EAGAIN;
 
-	if (aq_rc >= (sizeof(aq_to_posix) / sizeof((aq_to_posix)[0])) ||
-	    aq_rc < 0)
+	if (!((u32)aq_rc < (sizeof(aq_to_posix) / sizeof((aq_to_posix)[0]))))
 		return -ERANGE;
 
 	return aq_to_posix[aq_rc];

drivers/net/ethernet/intel/i40evf/i40e_adminq.h

@@ -144,8 +144,7 @@ static inline int i40e_aq_rc_to_posix(int aq_ret, int aq_rc)
 	if (aq_ret == I40E_ERR_ADMIN_QUEUE_TIMEOUT)
 		return -EAGAIN;
 
-	if (aq_rc >= (sizeof(aq_to_posix) / sizeof((aq_to_posix)[0])) ||
-	    aq_rc < 0)
+	if (!((u32)aq_rc < (sizeof(aq_to_posix) / sizeof((aq_to_posix)[0]))))
 		return -ERANGE;
 
 	return aq_to_posix[aq_rc];