drm/amd/pp: use mlck_table.count for array loop index limit

v2: use temporaries to trivially reduces object size.

The for-loops process data in the mclk_table but use slck_table.count
as the loop index limit.  I believe these are cut-n-paste errors from
the previous almost identical loops as indicated by static analysis.
Fix these.

Detected by CoverityScan, CID#1466001 ("Copy-paste error")

Fixes: 5d97cf39 ("drm/amd/pp: Add and initialize OD_dpm_table for CI/VI.")
Fixes: 5e4d4fbe ("drm/amd/pp: Implement edit_dpm_table on smu7")

Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>