QHash: Fix building for i386 after "add support for VAES and AVX512VL"

Fix a typo from da1720485e,
where mm_cvtsz_si128 was undefined when building for a 32 bit
target. The code would make it seem this was a typo, with the
listing of defines didn't match between 32 and 64 bit.

Change-Id: Ica24d88e7f71ecd1d24ed990773711f9105f3ec8
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

src/corelib/tools/qhash.cpp

@@ -525,7 +525,7 @@ static uint siphash(const uint8_t *in, uint inlen, uint seed, uint seed2)
 #    define mm256_set1_epz  _mm256_set1_epi64x
 #  else
 #    define mm_set1_epz     _mm_set1_epi32
-#    define mm_cvtepz_si128 _mm_cvtsi32_si128
+#    define mm_cvtsz_si128  _mm_cvtsi32_si128
 #    define mm_cvtsi128_sz  _mm_cvtsi128_si32
 #    define mm256_set1_epz  _mm256_set1_epi32
 #  endif