iommu/amd: Remove variable cnt ind iommu_poll_ga_log()

Variable cnt is just being incremented and it's never used
anywhere else. The variable and the increment are redundant so
remove it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20221024134301.2158939-1-colin.i.king@gmail.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>