[Arista] Rename chip in sensors.conf for 7170 platform (sonic-net#6026)

Rename chip name dps1900-i2c-X-58 to pmbus-i2c-X-58 in sensors.conf for Arista 7170 due to latest updates for Arista driver submodules sonic-net#5686. After these updates adapter dps1900 was renamed and sensors.conf file is not applied properly. Issue was observed started from BFN SONiC image 16.

Signed-off-by: Nazar Tkachuk <nazarx.tkachuk@intel.com>

device/arista/x86_64-arista_7170_64c/sensors.conf

@@ -20,7 +20,7 @@ chip "max6658-i2c-8-4c"
     set temp2_min -55
     ignore temp2
 
-chip "dps1900-i2c-6-58"
+chip "pmbus-i2c-6-58"
     label temp1 "PSU1 primary hotspot temp"
     label temp2 "PSU1 inlet temp"
     label temp3 "PSU1 exhaust temp"
@@ -31,7 +31,7 @@ chip "dps1900-i2c-6-58"
     ignore fan2
     ignore fan3
 
-chip "dps1900-i2c-7-58"
+chip "pmbus-i2c-7-58"
     label temp1 "PSU2 primary hotspot temp"
     label temp2 "PSU2 inlet temp"
     label temp3 "PSU2 exhaust temp"