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

jira VULN-72065
cve CVE-2025-38200
commit-author Kyungwook Boo <bookyungwook@gmail.com>
commit 015bac5

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>
(cherry picked from commit 015bac5)
	Signed-off-by: Roxana Nicolescu <rnicolescu@ciq.com>

Author: roxanan1996

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

@@ -1070,10 +1070,11 @@ 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;