ixgbe: fix typo in function comment for ixgbe_get_num_per_func()

ixgbe: fix typo in function comment for ixgbe_get_num_per_func()

Correct a typo in the comment where "PH" was used instead of "PF".
The function returns the number of resources per PF or 0 if no PFs
are available.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Signed-off-by: Qiang Liu <liuqiang@kylinos.cn>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Link: https://patch.msgid.link/20250905163353.3031910-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>