Fix a typo that broke certain build combinations

This code path was only compiled if SVE is enabled and the ifunc
attribute is not. Normally !ifunc is tested by the MacOS builds, but SVE
is disabled in that case.

src/common_memcpy.cpp

@@ -190,7 +190,7 @@ void *memcpy_nontemporal(void * __restrict__ dest, const void * __restrict__ src
 {
 #if SPEAD2_USE_SVE_STREAM
     static void *(*memcpy_nontemporal_ptr)(void * __restrict__ dest, const void * __restrict__ src, std::size_t n) noexcept =
-        spead2_resolve_memcpy_nontemporal(getauxval(AT_HWCAPS));
+        spead2_resolve_memcpy_nontemporal(getauxval(AT_HWCAP));
 #else
     static void *(*memcpy_nontemporal_ptr)(void * __restrict__ dest, const void * __restrict__ src, std::size_t n) noexcept =
         spead2_resolve_memcpy_nontemporal();