ext: lib: tinycbor: fix half-FP feature compilation

half-FP feature requires <math.h> form newlib_libc. It was include
wrongly by default. This path fix conduction for related include
directive.

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

Author: nvlsianpu

ext/lib/encoding/tinycbor/src/compilersupport_p.h

@@ -41,7 +41,7 @@ extern "C" {
 #  include <assert.h>
 #endif
 #include <float.h>
-#ifndef CBOR_NO_FLOATING_TYPE
+#ifndef CBOR_NO_HALF_FLOAT_TYPE
 #include <math.h>
 #endif
 #include <stddef.h>