swift: Add dps310 ambient sensor

Swift has 3 ambient temperature sensors, the dps310 will be labeled as
`ambient1` and initially use the same warn/crit temperature
configurations as Witherspoon.

Tested:
    Built image that contained the config file

Change-Id: I85fd2e44fb4229bee04f6cc4a75613e7945ee754
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
diff --git a/meta-witherspoon/recipes-phosphor/sensors/phosphor-hwmon/swift/obmc/hwmon/ahb/apb/bus@1e78a000/i2c-bus@300/dps310@76.conf b/meta-witherspoon/recipes-phosphor/sensors/phosphor-hwmon/swift/obmc/hwmon/ahb/apb/bus@1e78a000/i2c-bus@300/dps310@76.conf
new file mode 100644
index 0000000..d685863
--- /dev/null
+++ b/meta-witherspoon/recipes-phosphor/sensors/phosphor-hwmon/swift/obmc/hwmon/ahb/apb/bus@1e78a000/i2c-bus@300/dps310@76.conf
@@ -0,0 +1,5 @@
+LABEL_temp1 = "ambient1"
+WARNHI_temp1 = "25000"
+WARNLO_temp1 = "0"
+CRITHI_temp1 = "35000"
+CRITLO_temp1 = "0"