Revert "SWDEV-419480 - HIPRTC implementation of standard headers shouldn't be in std namespace"

This reverts commit 353dbe6e3b.

Reason for revert: This is considered a breaking change and requires
multiple apps to change their behavior. This will be reintroduced in later releases.

Change-Id: I3481627115af1872785585a155cc6a0ecfbe1372

hipamd/src/hiprtc/cmake/HIPRTC.cmake

@@ -60,13 +60,6 @@ function(get_hiprtc_macros HIPRTC_DEFINES)
 #define HIP_INCLUDE_HIP_MATH_FUNCTIONS_H\n\
 #define HIP_INCLUDE_HIP_HIP_VECTOR_TYPES_H\n\
 #if !__HIP_NO_STD_DEFS__\n\
-#if defined(_WIN32)\n\
-typedef unsigned long long uint64_t;\n\
-typedef signed long long int64_t;\n\
-#else\n\
-typedef unsigned long uint64_t;\n\
-typedef signed long int64_t;\n\
-#endif\n\
 #if defined(__HIPRTC_PTRDIFF_T_IS_LONG_LONG__) && __HIPRTC_PTRDIFF_T_IS_LONG_LONG__==1\n\
 typedef long long ptrdiff_t;\n\
 #else\n\
@@ -74,8 +67,6 @@ typedef __PTRDIFF_TYPE__ ptrdiff_t;\n\
 #endif\n\
 typedef long clock_t;\n\
 namespace std {\n\
-using ::uint64_t;\n\
-using ::int64_t;\n\
 using ::ptrdiff_t;\n\
 using ::clock_t;\n\
 }\n\