Allow <adxintrin.h> for IA MCU

It is OK to include <adxintrin.h> for IA MCU since GCC can generate ADX
intrinsics with alternative instuctions if ADX isn't enabled.

	PR target/66746
	* config/i386/x86intrin.h: Include <adxintrin.h> even if
	__iamcu__ is defined.

From-SVN: r225580

gcc/ChangeLog

+2015-07-08  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/66746
+	* config/i386/x86intrin.h: Include <adxintrin.h> even if
+	__iamcu__ is defined.
+
 2015-07-08  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/predicates.md (general_reg_operand): Use GENERAL_REGNO_P.

gcc/config/i386/x86intrin.h

@@ -75,8 +75,12 @@
 
 #include <xsaveoptintrin.h>
 
+#endif /* __iamcu__ */
+
 #include <adxintrin.h>
 
+#ifndef __iamcu__
+
 #include <clwbintrin.h>
 
 #include <pcommitintrin.h>