[Mellanox] Support DSCP remapping in Dual-ToR topo for SN4700-O8V48, …

…update buffers for t0 (fixes after recalculation)

Signed-off-by: Andriy Yurkiv <ayurkiv@nvidia.com>

device/mellanox/x86_64-mlnx_msn4700-r0/Mellanox-SN4700-O8V48/buffers_defaults_t0.j2

@@ -15,10 +15,10 @@
 #}
 {% set default_cable = '5m' %}
 {%- if ((SYSTEM_DEFAULTS is defined) and ('tunnel_qos_remap' in SYSTEM_DEFAULTS) and (SYSTEM_DEFAULTS['tunnel_qos_remap']['status'] == 'enabled')) -%}
-{% set ingress_lossless_pool_size =  '45907968' %}
-{% set ingress_lossless_pool_xoff  =  '7479296' %}
+{% set ingress_lossless_pool_size =  '48168960' %}
+{% set ingress_lossless_pool_xoff  =  '5218304' %}
 {% set egress_lossless_pool_size =  '60817392' %}
-{% set egress_lossy_pool_size =  '45907968' %}
+{% set egress_lossy_pool_size =  '48168960' %}
 {%- else -%}
 {% set ingress_lossless_pool_size =  '49946624' %}
 {% set ingress_lossless_pool_xoff  =  '4063232' %}