machine/ieeefp.h: Fix up new math hacks when double is 32 bits

The new math code requires 64-bit doubles, but the hack in ieeefp.h to
disable it was missing a couple of steps to undefine
__OBSOLETE_MATH_DEFAULT_FLOAT and __OBSOLETE_MATH_DEFAULT_DOUBLE.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

newlib/libc/include/machine/ieeefp.h

@@ -579,6 +579,8 @@ warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #undef __OBSOLETE_MATH
 #undef __OBSOLETE_MATH_DOUBLE
 #undef __OBSOLETE_MATH_FLOAT
+#undef __OBSOLETE_MATH_DEFAULT_FLOAT
+#undef __OBSOLETE_MATH_DEFAULT_DOUBLE
 #define __OBSOLETE_MATH 1
 #endif