Query switch chip type over gNMI

[pudelkoM]

Stratum supports reading the chip type over gNMI: stratum/stratum#311

fabric-tna/src/main/java/org/stratumproject/fabric/tna/behaviour/FabricCapabilities.java

Lines 37 to 40 in 5dc6523

	// FIXME: use chip type (or platform name) when Stratum will support
	// reading that via gNMI. Until then, we need to rely on the
	// pipeconf name (which prevents us from using chip-independent
	// pipeconfs).

could be solved now.