platform/mellanox: mlxbf-pmc: Fix offset calculation for crspace events

The event selector fields for 2 counters are contained in one
32-bit register and the current logic does not account for this.

Fixes: 423c336 ("platform/mellanox: mlxbf-pmc: Add support for BlueField-3")
Signed-off-by: Shravan Kumar Ramani <shravankr@nvidia.com>
Reviewed-by: David Thompson <davthompson@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/8834cfa496c97c7c2fcebcfca5a2aa007e20ae96.1705485095.git.shravankr@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Author: shravankumarr

drivers/platform/mellanox/mlxbf-pmc.c

@@ -1170,7 +1170,7 @@ static int mlxbf_pmc_program_crspace_counter(int blk_num, uint32_t cnt_num,
 	int ret;
 
 	addr = pmc->block[blk_num].mmio_base +
-		(rounddown(cnt_num, 2) * MLXBF_PMC_CRSPACE_PERFSEL_SZ);
+		((cnt_num / 2) * MLXBF_PMC_CRSPACE_PERFSEL_SZ);
 	ret = mlxbf_pmc_readl(addr, &word);
 	if (ret)
 		return ret;
@@ -1413,7 +1413,7 @@ static int mlxbf_pmc_read_crspace_event(int blk_num, uint32_t cnt_num,
 	int ret;
 
 	addr = pmc->block[blk_num].mmio_base +
-		(rounddown(cnt_num, 2) * MLXBF_PMC_CRSPACE_PERFSEL_SZ);
+		((cnt_num / 2) * MLXBF_PMC_CRSPACE_PERFSEL_SZ);
 	ret = mlxbf_pmc_readl(addr, &word);
 	if (ret)
 		return ret;