i40e: fix MMIO write access to an invalid page in i40e_clear_hw

JIRA: https://issues.redhat.com/browse/RHEL-83569

commit 015bac5
Author: Kyungwook Boo <bookyungwook@gmail.com>
Date:   Tue Mar 11 14:16:02 2025 +0900

    i40e: fix MMIO write access to an invalid page in i40e_clear_hw

    When the device sends a specific input, an integer underflow can occur, leading
    to MMIO write access to an invalid page.

    Prevent the integer underflow by changing the type of related variables.

    Signed-off-by: Kyungwook Boo <bookyungwook@gmail.com>
    Link: https://lore.kernel.org/lkml/ffc91764-1142-4ba2-91b6-8c773f6f7095@gmail.com/T/
    Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
    Reviewed-by: Simon Horman <horms@kernel.org>
    Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
    Tested-by: Rinitha S <sx.rinitha@intel.com> (A Contingent worker at Intel)
    Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

Signed-off-by: Dennis Chen <dechen@redhat.com>

Author: dchen5022

drivers/net/ethernet/intel/i40e/i40e_common.c

@@ -817,10 +817,11 @@ int i40e_pf_reset(struct i40e_hw *hw)
 void i40e_clear_hw(struct i40e_hw *hw)
 {
 	u32 num_queues, base_queue;
-	u32 num_pf_int;
-	u32 num_vf_int;
+	s32 num_pf_int;
+	s32 num_vf_int;
 	u32 num_vfs;
-	u32 i, j;
+	s32 i;
+	u32 j;
 	u32 val;
 	u32 eol = 0x7ff;