Consolidate switch logic in OS_SocketOpen_Impl

[skliper]

Is your feature request related to a problem? Please describe.
Duplicate switch cases that could be consolidated:

osal/src/os/portable/os-impl-bsd-sockets.c

Lines 102 to 113 in ead5723

	switch (stream->socket_type)
	{
	case OS_SocketType_DATAGRAM:
	os_type = SOCK_DGRAM;
	break;
	case OS_SocketType_STREAM:
	os_type = SOCK_STREAM;
	break;
	default:
	return OS_ERR_NOT_IMPLEMENTED;
	}

osal/src/os/portable/os-impl-bsd-sockets.c

Lines 129 to 138 in ead5723

	/* Only AF_INET* at this point, can add cases if support is expanded */
	switch (stream->socket_type)
	{
	case OS_SocketType_DATAGRAM:
	os_proto = IPPROTO_UDP;
	break;
	case OS_SocketType_STREAM:
	os_proto = IPPROTO_TCP;
	break;
	}

Describe the solution you'd like
Consolidate

Describe alternatives you've considered
Was separate if future domains were added... but is currently awkward looking.

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC, OSAL code review