tempget: Add lm75(4) temperature source for non-x86 FreeBSD

Summary:
Another suggestion from Dmitry Luhtionov. I am told this sensor (on the
i2c bus) is more likely to be present on non-x86 systems (ARM, etc).

Reviewers: zmike, q66

Reviewed By: q66

Subscribers: cedric, seoz

Differential Revision: https://phab.enlightenment.org/D2345

src/modules/temperature/tempget.c

@@ -38,6 +38,7 @@ static const char *sources[] =
      "hw.acpi.thermal.tz0.temperature",
      "dev.cpu.0.temperature",
      "dev.aibs.0.temp.0",
+     "dev.lm75.0.temperature",
      NULL
   };
 #endif